Home / 521,567,991.40-782,351,987.10-138,615,543.40

Finding the Fourth Proportional to 521,567,991.40, 782,351,987.10 and 138,615,543.40

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Solution

The fourth proportional to 521,567,991.40, 782,351,987.10 and 138,615,543.40 is: 207,923,315.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,567,991.40 : 782,351,987.10 = 138,615,543.40 : x
  2. Step 2: Convert to fraction form
    521,567,991.40/782,351,987.10 = 138,615,543.40/x
  3. Step 3: Cross multiply
    521,567,991.40x = 782,351,987.10 × 138,615,543.40
  4. Step 4: Simplify right side
    521,567,991.40x = 108,446,145,821,936,304
  5. Step 5: Solve for x
    x = 108,446,145,821,936,304/521,567,991.40
  6. Step 6: Final answer
    x = 207,923,315.10

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.