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Finding the Fourth Proportional to 125,277, 172,972.98 and 80,642.76

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Solution

The fourth proportional to 125,277, 172,972.98 and 80,642.76 is: 111,345.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,277 : 172,972.98 = 80,642.76 : x
  2. Step 2: Convert to fraction form
    125,277/172,972.98 = 80,642.76/x
  3. Step 3: Cross multiply
    125,277x = 172,972.98 × 80,642.76
  4. Step 4: Simplify right side
    125,277x = 13,949,018,512.62
  5. Step 5: Solve for x
    x = 13,949,018,512.62/125,277
  6. Step 6: Final answer
    x = 111,345.41

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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.