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Finding the Fourth Proportional to 125,730.75, 173,503.16 and 71,286.59

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Solution

The fourth proportional to 125,730.75, 173,503.16 and 71,286.59 is: 98,372.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,730.75 : 173,503.16 = 71,286.59 : x
  2. Step 2: Convert to fraction form
    125,730.75/173,503.16 = 71,286.59/x
  3. Step 3: Cross multiply
    125,730.75x = 173,503.16 × 71,286.59
  4. Step 4: Simplify right side
    125,730.75x = 12,368,447,406.68
  5. Step 5: Solve for x
    x = 12,368,447,406.68/125,730.75
  6. Step 6: Final answer
    x = 98,372.49

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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.