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Finding the Fourth Proportional to 129,791.33, 179,124.57 and 78,792.24

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Solution

The fourth proportional to 129,791.33, 179,124.57 and 78,792.24 is: 108,740.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,791.33 : 179,124.57 = 78,792.24 : x
  2. Step 2: Convert to fraction form
    129,791.33/179,124.57 = 78,792.24/x
  3. Step 3: Cross multiply
    129,791.33x = 179,124.57 × 78,792.24
  4. Step 4: Simplify right side
    129,791.33x = 14,113,626,109.34
  5. Step 5: Solve for x
    x = 14,113,626,109.34/129,791.33
  6. Step 6: Final answer
    x = 108,740.90

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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.