Home / 81,730,101.38-122,595,603.57-20,319,260.15

Finding the Fourth Proportional to 81,730,101.38, 122,595,603.57 and 20,319,260.15

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Solution

The fourth proportional to 81,730,101.38, 122,595,603.57 and 20,319,260.15 is: 30,479,002.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,730,101.38 : 122,595,603.57 = 20,319,260.15 : x
  2. Step 2: Convert to fraction form
    81,730,101.38/122,595,603.57 = 20,319,260.15/x
  3. Step 3: Cross multiply
    81,730,101.38x = 122,595,603.57 × 20,319,260.15
  4. Step 4: Simplify right side
    81,730,101.38x = 2,491,051,961,572,120.50
  5. Step 5: Solve for x
    x = 2,491,051,961,572,120.50/81,730,101.38
  6. Step 6: Final answer
    x = 30,479,002.47

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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.