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Finding the Fourth Proportional to 121,679.52, 182,368.56 and 68,929.12

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Solution

The fourth proportional to 121,679.52, 182,368.56 and 68,929.12 is: 103,308.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,679.52 : 182,368.56 = 68,929.12 : x
  2. Step 2: Convert to fraction form
    121,679.52/182,368.56 = 68,929.12/x
  3. Step 3: Cross multiply
    121,679.52x = 182,368.56 × 68,929.12
  4. Step 4: Simplify right side
    121,679.52x = 12,570,504,356.47
  5. Step 5: Solve for x
    x = 12,570,504,356.47/121,679.52
  6. Step 6: Final answer
    x = 103,308.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.