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Finding the Fourth Proportional to 125,129.50, 172,678.80 and 68,541.10

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Solution

The fourth proportional to 125,129.50, 172,678.80 and 68,541.10 is: 94,586.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,129.50 : 172,678.80 = 68,541.10 : x
  2. Step 2: Convert to fraction form
    125,129.50/172,678.80 = 68,541.10/x
  3. Step 3: Cross multiply
    125,129.50x = 172,678.80 × 68,541.10
  4. Step 4: Simplify right side
    125,129.50x = 11,835,594,898.68
  5. Step 5: Solve for x
    x = 11,835,594,898.68/125,129.50
  6. Step 6: Final answer
    x = 94,586.77

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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.