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Finding the Fourth Proportional to 229,635.12, 316,895.04 and 129,033.12

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Solution

The fourth proportional to 229,635.12, 316,895.04 and 129,033.12 is: 178,064.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,635.12 : 316,895.04 = 129,033.12 : x
  2. Step 2: Convert to fraction form
    229,635.12/316,895.04 = 129,033.12/x
  3. Step 3: Cross multiply
    229,635.12x = 316,895.04 × 129,033.12
  4. Step 4: Simplify right side
    229,635.12x = 40,889,955,723.72
  5. Step 5: Solve for x
    x = 40,889,955,723.72/229,635.12
  6. Step 6: Final answer
    x = 178,064.90

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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.