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Finding the Fourth Proportional to 125,543, 173,264.70 and 72,551

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Solution

The fourth proportional to 125,543, 173,264.70 and 72,551 is: 100,129.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,543 : 173,264.70 = 72,551 : x
  2. Step 2: Convert to fraction form
    125,543/173,264.70 = 72,551/x
  3. Step 3: Cross multiply
    125,543x = 173,264.70 × 72,551
  4. Step 4: Simplify right side
    125,543x = 12,570,527,249.70
  5. Step 5: Solve for x
    x = 12,570,527,249.70/125,543
  6. Step 6: Final answer
    x = 100,129.26

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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.