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Finding the Fourth Proportional to 129,698.88, 178,984.56 and 70,082.88

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Solution

The fourth proportional to 129,698.88, 178,984.56 and 70,082.88 is: 96,714.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,698.88 : 178,984.56 = 70,082.88 : x
  2. Step 2: Convert to fraction form
    129,698.88/178,984.56 = 70,082.88/x
  3. Step 3: Cross multiply
    129,698.88x = 178,984.56 × 70,082.88
  4. Step 4: Simplify right side
    129,698.88x = 12,543,753,440.33
  5. Step 5: Solve for x
    x = 12,543,753,440.33/129,698.88
  6. Step 6: Final answer
    x = 96,714.43

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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.