Home / 521,567,990.40-782,351,985.60-138,615,542.40

Finding the Fourth Proportional to 521,567,990.40, 782,351,985.60 and 138,615,542.40

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Solution

The fourth proportional to 521,567,990.40, 782,351,985.60 and 138,615,542.40 is: 207,923,313.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,567,990.40 : 782,351,985.60 = 138,615,542.40 : x
  2. Step 2: Convert to fraction form
    521,567,990.40/782,351,985.60 = 138,615,542.40/x
  3. Step 3: Cross multiply
    521,567,990.40x = 782,351,985.60 × 138,615,542.40
  4. Step 4: Simplify right side
    521,567,990.40x = 108,446,144,831,660,992
  5. Step 5: Solve for x
    x = 108,446,144,831,660,992/521,567,990.40
  6. Step 6: Final answer
    x = 207,923,313.60

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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.