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Finding the Fourth Proportional to 129,695.16, 178,979.32 and 70,079.16

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Solution

The fourth proportional to 129,695.16, 178,979.32 and 70,079.16 is: 96,709.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,695.16 : 178,979.32 = 70,079.16 : x
  2. Step 2: Convert to fraction form
    129,695.16/178,979.32 = 70,079.16/x
  3. Step 3: Cross multiply
    129,695.16x = 178,979.32 × 70,079.16
  4. Step 4: Simplify right side
    129,695.16x = 12,542,720,227.77
  5. Step 5: Solve for x
    x = 12,542,720,227.77/129,695.16
  6. Step 6: Final answer
    x = 96,709.24

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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.