Home / 521,605,009.40-782,407,514.10-158,052,126.20

Finding the Fourth Proportional to 521,605,009.40, 782,407,514.10 and 158,052,126.20

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Solution

The fourth proportional to 521,605,009.40, 782,407,514.10 and 158,052,126.20 is: 237,078,189.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,605,009.40 : 782,407,514.10 = 158,052,126.20 : x
  2. Step 2: Convert to fraction form
    521,605,009.40/782,407,514.10 = 158,052,126.20/x
  3. Step 3: Cross multiply
    521,605,009.40x = 782,407,514.10 × 158,052,126.20
  4. Step 4: Simplify right side
    521,605,009.40x = 123,661,171,158,361,472
  5. Step 5: Solve for x
    x = 123,661,171,158,361,472/521,605,009.40
  6. Step 6: Final answer
    x = 237,078,189.30

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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.