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Finding the Fourth Proportional to 138,574.76, 207,706.62 and 68,503.28

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Solution

The fourth proportional to 138,574.76, 207,706.62 and 68,503.28 is: 102,678.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,574.76 : 207,706.62 = 68,503.28 : x
  2. Step 2: Convert to fraction form
    138,574.76/207,706.62 = 68,503.28/x
  3. Step 3: Cross multiply
    138,574.76x = 207,706.62 × 68,503.28
  4. Step 4: Simplify right side
    138,574.76x = 14,228,584,747.71
  5. Step 5: Solve for x
    x = 14,228,584,747.71/138,574.76
  6. Step 6: Final answer
    x = 102,678.04

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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.