Home / 138,740.46-208,220.04-71,269.74

Finding the Fourth Proportional to 138,740.46, 208,220.04 and 71,269.74

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Solution

The fourth proportional to 138,740.46, 208,220.04 and 71,269.74 is: 106,960.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,740.46 : 208,220.04 = 71,269.74 : x
  2. Step 2: Convert to fraction form
    138,740.46/208,220.04 = 71,269.74/x
  3. Step 3: Cross multiply
    138,740.46x = 208,220.04 × 71,269.74
  4. Step 4: Simplify right side
    138,740.46x = 14,839,788,113.59
  5. Step 5: Solve for x
    x = 14,839,788,113.59/138,740.46
  6. Step 6: Final answer
    x = 106,960.78

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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.