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Finding the Fourth Proportional to 129,487.56, 178,794.18 and 101,273.64

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Solution

The fourth proportional to 129,487.56, 178,794.18 and 101,273.64 is: 139,836.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,487.56 : 178,794.18 = 101,273.64 : x
  2. Step 2: Convert to fraction form
    129,487.56/178,794.18 = 101,273.64/x
  3. Step 3: Cross multiply
    129,487.56x = 178,794.18 × 101,273.64
  4. Step 4: Simplify right side
    129,487.56x = 18,107,137,419.42
  5. Step 5: Solve for x
    x = 18,107,137,419.42/129,487.56
  6. Step 6: Final answer
    x = 139,836.89

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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.