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Finding the Fourth Proportional to 125,838.68, 173,664.87 and 72,127.17

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Solution

The fourth proportional to 125,838.68, 173,664.87 and 72,127.17 is: 99,539.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,838.68 : 173,664.87 = 72,127.17 : x
  2. Step 2: Convert to fraction form
    125,838.68/173,664.87 = 72,127.17/x
  3. Step 3: Cross multiply
    125,838.68x = 173,664.87 × 72,127.17
  4. Step 4: Simplify right side
    125,838.68x = 12,525,955,601.52
  5. Step 5: Solve for x
    x = 12,525,955,601.52/125,838.68
  6. Step 6: Final answer
    x = 99,539.79

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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.