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Finding the Fourth Proportional to 129,792.64, 179,112.96 and 70,176.64

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Solution

The fourth proportional to 129,792.64, 179,112.96 and 70,176.64 is: 96,843.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,792.64 : 179,112.96 = 70,176.64 : x
  2. Step 2: Convert to fraction form
    129,792.64/179,112.96 = 70,176.64/x
  3. Step 3: Cross multiply
    129,792.64x = 179,112.96 × 70,176.64
  4. Step 4: Simplify right side
    129,792.64x = 12,569,545,713.25
  5. Step 5: Solve for x
    x = 12,569,545,713.25/129,792.64
  6. Step 6: Final answer
    x = 96,843.29

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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.