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Finding the Fourth Proportional to 229,103.92, 316,165.20 and 127,129.78

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Solution

The fourth proportional to 229,103.92, 316,165.20 and 127,129.78 is: 175,440.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,103.92 : 316,165.20 = 127,129.78 : x
  2. Step 2: Convert to fraction form
    229,103.92/316,165.20 = 127,129.78/x
  3. Step 3: Cross multiply
    229,103.92x = 316,165.20 × 127,129.78
  4. Step 4: Simplify right side
    229,103.92x = 40,194,012,319.66
  5. Step 5: Solve for x
    x = 40,194,012,319.66/229,103.92
  6. Step 6: Final answer
    x = 175,440.09

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1.5x scale

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.