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Finding the Fourth Proportional to 89,002.40, 133,244.40 and 86,410.40

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Solution

The fourth proportional to 89,002.40, 133,244.40 and 86,410.40 is: 129,363.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,002.40 : 133,244.40 = 86,410.40 : x
  2. Step 2: Convert to fraction form
    89,002.40/133,244.40 = 86,410.40/x
  3. Step 3: Cross multiply
    89,002.40x = 133,244.40 × 86,410.40
  4. Step 4: Simplify right side
    89,002.40x = 11,513,701,901.76
  5. Step 5: Solve for x
    x = 11,513,701,901.76/89,002.40
  6. Step 6: Final answer
    x = 129,363.95

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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.