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Finding the Fourth Proportional to 125,863.80, 173,672.18 and 72,138.52

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Solution

The fourth proportional to 125,863.80, 173,672.18 and 72,138.52 is: 99,539.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,863.80 : 173,672.18 = 72,138.52 : x
  2. Step 2: Convert to fraction form
    125,863.80/173,672.18 = 72,138.52/x
  3. Step 3: Cross multiply
    125,863.80x = 173,672.18 × 72,138.52
  4. Step 4: Simplify right side
    125,863.80x = 12,528,454,030.37
  5. Step 5: Solve for x
    x = 12,528,454,030.37/125,863.80
  6. Step 6: Final answer
    x = 99,539.77

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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.