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Finding the Fourth Proportional to 125,276.78, 172,881.87 and 68,689.10

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Solution

The fourth proportional to 125,276.78, 172,881.87 and 68,689.10 is: 94,790.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,276.78 : 172,881.87 = 68,689.10 : x
  2. Step 2: Convert to fraction form
    125,276.78/172,881.87 = 68,689.10/x
  3. Step 3: Cross multiply
    125,276.78x = 172,881.87 × 68,689.10
  4. Step 4: Simplify right side
    125,276.78x = 11,875,100,056.62
  5. Step 5: Solve for x
    x = 11,875,100,056.62/125,276.78
  6. Step 6: Final answer
    x = 94,790.91

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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.