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Finding the Fourth Proportional to 89,165,641.80, 133,748,462.70 and 79,812,280.20

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Solution

The fourth proportional to 89,165,641.80, 133,748,462.70 and 79,812,280.20 is: 119,718,420.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,165,641.80 : 133,748,462.70 = 79,812,280.20 : x
  2. Step 2: Convert to fraction form
    89,165,641.80/133,748,462.70 = 79,812,280.20/x
  3. Step 3: Cross multiply
    89,165,641.80x = 133,748,462.70 × 79,812,280.20
  4. Step 4: Simplify right side
    89,165,641.80x = 10,674,769,781,331,650
  5. Step 5: Solve for x
    x = 10,674,769,781,331,650/89,165,641.80
  6. Step 6: Final answer
    x = 119,718,420.30

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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.