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Finding the Fourth Proportional to 125,103.84, 172,600.40 and 71,350.20

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Solution

The fourth proportional to 125,103.84, 172,600.40 and 71,350.20 is: 98,438.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,103.84 : 172,600.40 = 71,350.20 : x
  2. Step 2: Convert to fraction form
    125,103.84/172,600.40 = 71,350.20/x
  3. Step 3: Cross multiply
    125,103.84x = 172,600.40 × 71,350.20
  4. Step 4: Simplify right side
    125,103.84x = 12,315,073,060.08
  5. Step 5: Solve for x
    x = 12,315,073,060.08/125,103.84
  6. Step 6: Final answer
    x = 98,438.81

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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.