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Finding the Fourth Proportional to 125,046.88, 172,564.32 and 68,457.76

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Solution

The fourth proportional to 125,046.88, 172,564.32 and 68,457.76 is: 94,471.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,046.88 : 172,564.32 = 68,457.76 : x
  2. Step 2: Convert to fraction form
    125,046.88/172,564.32 = 68,457.76/x
  3. Step 3: Cross multiply
    125,046.88x = 172,564.32 × 68,457.76
  4. Step 4: Simplify right side
    125,046.88x = 11,813,366,803.12
  5. Step 5: Solve for x
    x = 11,813,366,803.12/125,046.88
  6. Step 6: Final answer
    x = 94,471.50

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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.