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Finding the Fourth Proportional to 121,679.52, 182,368.60 and 68,929.08

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Solution

The fourth proportional to 121,679.52, 182,368.60 and 68,929.08 is: 103,308.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,679.52 : 182,368.60 = 68,929.08 : x
  2. Step 2: Convert to fraction form
    121,679.52/182,368.60 = 68,929.08/x
  3. Step 3: Cross multiply
    121,679.52x = 182,368.60 × 68,929.08
  4. Step 4: Simplify right side
    121,679.52x = 12,570,499,818.89
  5. Step 5: Solve for x
    x = 12,570,499,818.89/121,679.52
  6. Step 6: Final answer
    x = 103,308.26

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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.