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Finding the Fourth Proportional to 125,265, 172,956.42 and 80,630.76

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Solution

The fourth proportional to 125,265, 172,956.42 and 80,630.76 is: 111,328.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,265 : 172,956.42 = 80,630.76 : x
  2. Step 2: Convert to fraction form
    125,265/172,956.42 = 80,630.76/x
  3. Step 3: Cross multiply
    125,265x = 172,956.42 × 80,630.76
  4. Step 4: Simplify right side
    125,265x = 13,945,607,591.48
  5. Step 5: Solve for x
    x = 13,945,607,591.48/125,265
  6. Step 6: Final answer
    x = 111,328.84

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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.