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Finding the Fourth Proportional to 138,754.56, 208,170.72 and 55,706.88

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Solution

The fourth proportional to 138,754.56, 208,170.72 and 55,706.88 is: 83,575.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,754.56 : 208,170.72 = 55,706.88 : x
  2. Step 2: Convert to fraction form
    138,754.56/208,170.72 = 55,706.88/x
  3. Step 3: Cross multiply
    138,754.56x = 208,170.72 × 55,706.88
  4. Step 4: Simplify right side
    138,754.56x = 11,596,541,318.55
  5. Step 5: Solve for x
    x = 11,596,541,318.55/138,754.56
  6. Step 6: Final answer
    x = 83,575.93

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1.5x scale

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.