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Finding the Fourth Proportional to 138,957.53, 191,759.40 and 78,527.61

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Solution

The fourth proportional to 138,957.53, 191,759.40 and 78,527.61 is: 108,366.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,957.53 : 191,759.40 = 78,527.61 : x
  2. Step 2: Convert to fraction form
    138,957.53/191,759.40 = 78,527.61/x
  3. Step 3: Cross multiply
    138,957.53x = 191,759.40 × 78,527.61
  4. Step 4: Simplify right side
    138,957.53x = 15,058,407,377.03
  5. Step 5: Solve for x
    x = 15,058,407,377.03/138,957.53
  6. Step 6: Final answer
    x = 108,366.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.