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Finding the Fourth Proportional to 71,668,600.69, 106,979,693.11 and 61,498,812.85

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Solution

The fourth proportional to 71,668,600.69, 106,979,693.11 and 61,498,812.85 is: 91,799,254.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,668,600.69 : 106,979,693.11 = 61,498,812.85 : x
  2. Step 2: Convert to fraction form
    71,668,600.69/106,979,693.11 = 61,498,812.85/x
  3. Step 3: Cross multiply
    71,668,600.69x = 106,979,693.11 × 61,498,812.85
  4. Step 4: Simplify right side
    71,668,600.69x = 6,579,124,125,322,325
  5. Step 5: Solve for x
    x = 6,579,124,125,322,325/71,668,600.69
  6. Step 6: Final answer
    x = 91,799,254.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.