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Finding the Fourth Proportional to 125,876.87, 173,689.75 and 72,152

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Solution

The fourth proportional to 125,876.87, 173,689.75 and 72,152 is: 99,558.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,876.87 : 173,689.75 = 72,152 : x
  2. Step 2: Convert to fraction form
    125,876.87/173,689.75 = 72,152/x
  3. Step 3: Cross multiply
    125,876.87x = 173,689.75 × 72,152
  4. Step 4: Simplify right side
    125,876.87x = 12,532,062,842
  5. Step 5: Solve for x
    x = 12,532,062,842/125,876.87
  6. Step 6: Final answer
    x = 99,558.11

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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.