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Finding the Fourth Proportional to 125,229.20, 172,815.90 and 67,870.20

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Solution

The fourth proportional to 125,229.20, 172,815.90 and 67,870.20 is: 93,660.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,229.20 : 172,815.90 = 67,870.20 : x
  2. Step 2: Convert to fraction form
    125,229.20/172,815.90 = 67,870.20/x
  3. Step 3: Cross multiply
    125,229.20x = 172,815.90 × 67,870.20
  4. Step 4: Simplify right side
    125,229.20x = 11,729,049,696.18
  5. Step 5: Solve for x
    x = 11,729,049,696.18/125,229.20
  6. Step 6: Final answer
    x = 93,660.66

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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.