Home / 521,603,999.40-782,405,999.10-138,651,551.40

Finding the Fourth Proportional to 521,603,999.40, 782,405,999.10 and 138,651,551.40

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Solution

The fourth proportional to 521,603,999.40, 782,405,999.10 and 138,651,551.40 is: 207,977,327.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,603,999.40 : 782,405,999.10 = 138,651,551.40 : x
  2. Step 2: Convert to fraction form
    521,603,999.40/782,405,999.10 = 138,651,551.40/x
  3. Step 3: Cross multiply
    521,603,999.40x = 782,405,999.10 × 138,651,551.40
  4. Step 4: Simplify right side
    521,603,999.40x = 108,481,805,599,882,016
  5. Step 5: Solve for x
    x = 108,481,805,599,882,016/521,603,999.40
  6. Step 6: Final answer
    x = 207,977,327.10

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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.