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Finding the Fourth Proportional to 121,354.88, 167,469.36 and 67,639.28

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Solution

The fourth proportional to 121,354.88, 167,469.36 and 67,639.28 is: 93,342.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,354.88 : 167,469.36 = 67,639.28 : x
  2. Step 2: Convert to fraction form
    121,354.88/167,469.36 = 67,639.28/x
  3. Step 3: Cross multiply
    121,354.88x = 167,469.36 × 67,639.28
  4. Step 4: Simplify right side
    121,354.88x = 11,327,506,932.46
  5. Step 5: Solve for x
    x = 11,327,506,932.46/121,354.88
  6. Step 6: Final answer
    x = 93,342.00

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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.