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Finding the Fourth Proportional to 71,405.78, 106,470.28 and 69,444.01

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Solution

The fourth proportional to 71,405.78, 106,470.28 and 69,444.01 is: 103,545.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,405.78 : 106,470.28 = 69,444.01 : x
  2. Step 2: Convert to fraction form
    71,405.78/106,470.28 = 69,444.01/x
  3. Step 3: Cross multiply
    71,405.78x = 106,470.28 × 69,444.01
  4. Step 4: Simplify right side
    71,405.78x = 7,393,722,841.80
  5. Step 5: Solve for x
    x = 7,393,722,841.80/71,405.78
  6. Step 6: Final answer
    x = 103,545.16

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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.