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Finding the Fourth Proportional to 229,481, 316,713.48 and 128,879

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Solution

The fourth proportional to 229,481, 316,713.48 and 128,879 is: 177,869.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,481 : 316,713.48 = 128,879 : x
  2. Step 2: Convert to fraction form
    229,481/316,713.48 = 128,879/x
  3. Step 3: Cross multiply
    229,481x = 316,713.48 × 128,879
  4. Step 4: Simplify right side
    229,481x = 40,817,716,588.92
  5. Step 5: Solve for x
    x = 40,817,716,588.92/229,481
  6. Step 6: Final answer
    x = 177,869.70

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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.