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Finding the Fourth Proportional to 129,252.32, 178,368.48 and 72,664.16

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Solution

The fourth proportional to 129,252.32, 178,368.48 and 72,664.16 is: 100,276.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,252.32 : 178,368.48 = 72,664.16 : x
  2. Step 2: Convert to fraction form
    129,252.32/178,368.48 = 72,664.16/x
  3. Step 3: Cross multiply
    129,252.32x = 178,368.48 × 72,664.16
  4. Step 4: Simplify right side
    129,252.32x = 12,960,995,769.68
  5. Step 5: Solve for x
    x = 12,960,995,769.68/129,252.32
  6. Step 6: Final answer
    x = 100,276.70

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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.