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Finding the Fourth Proportional to 88,721.40, 133,082.10 and 71,225.40

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Solution

The fourth proportional to 88,721.40, 133,082.10 and 71,225.40 is: 106,838.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,721.40 : 133,082.10 = 71,225.40 : x
  2. Step 2: Convert to fraction form
    88,721.40/133,082.10 = 71,225.40/x
  3. Step 3: Cross multiply
    88,721.40x = 133,082.10 × 71,225.40
  4. Step 4: Simplify right side
    88,721.40x = 9,478,825,805.34
  5. Step 5: Solve for x
    x = 9,478,825,805.34/88,721.40
  6. Step 6: Final answer
    x = 106,838.10

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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.