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Finding the Fourth Proportional to 129,695.26, 178,979.50 and 70,079.26

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Solution

The fourth proportional to 129,695.26, 178,979.50 and 70,079.26 is: 96,709.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,695.26 : 178,979.50 = 70,079.26 : x
  2. Step 2: Convert to fraction form
    129,695.26/178,979.50 = 70,079.26/x
  3. Step 3: Cross multiply
    129,695.26x = 178,979.50 × 70,079.26
  4. Step 4: Simplify right side
    129,695.26x = 12,542,750,915.17
  5. Step 5: Solve for x
    x = 12,542,750,915.17/129,695.26
  6. Step 6: Final answer
    x = 96,709.40

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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.