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Finding the Fourth Proportional to 121,407.49, 167,673 and 92,417.86

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Solution

The fourth proportional to 121,407.49, 167,673 and 92,417.86 is: 127,636.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,407.49 : 167,673 = 92,417.86 : x
  2. Step 2: Convert to fraction form
    121,407.49/167,673 = 92,417.86/x
  3. Step 3: Cross multiply
    121,407.49x = 167,673 × 92,417.86
  4. Step 4: Simplify right side
    121,407.49x = 15,495,979,839.78
  5. Step 5: Solve for x
    x = 15,495,979,839.78/121,407.49
  6. Step 6: Final answer
    x = 127,636.11

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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.