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Finding the Fourth Proportional to 89,806,952.80, 134,710,429.20 and 80,719,311.70

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Solution

The fourth proportional to 89,806,952.80, 134,710,429.20 and 80,719,311.70 is: 121,078,967.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,806,952.80 : 134,710,429.20 = 80,719,311.70 : x
  2. Step 2: Convert to fraction form
    89,806,952.80/134,710,429.20 = 80,719,311.70/x
  3. Step 3: Cross multiply
    89,806,952.80x = 134,710,429.20 × 80,719,311.70
  4. Step 4: Simplify right side
    89,806,952.80x = 10,873,733,123,835,582
  5. Step 5: Solve for x
    x = 10,873,733,123,835,582/89,806,952.80
  6. Step 6: Final answer
    x = 121,078,967.55

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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.