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Finding the Fourth Proportional to 121,424, 167,565.12 and 68,432

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Solution

The fourth proportional to 121,424, 167,565.12 and 68,432 is: 94,436.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,424 : 167,565.12 = 68,432 : x
  2. Step 2: Convert to fraction form
    121,424/167,565.12 = 68,432/x
  3. Step 3: Cross multiply
    121,424x = 167,565.12 × 68,432
  4. Step 4: Simplify right side
    121,424x = 11,466,816,291.84
  5. Step 5: Solve for x
    x = 11,466,816,291.84/121,424
  6. Step 6: Final answer
    x = 94,436.16

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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.