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Finding the Fourth Proportional to 121,364.60, 182,046.90 and 74,125.40

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Solution

The fourth proportional to 121,364.60, 182,046.90 and 74,125.40 is: 111,188.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,364.60 : 182,046.90 = 74,125.40 : x
  2. Step 2: Convert to fraction form
    121,364.60/182,046.90 = 74,125.40/x
  3. Step 3: Cross multiply
    121,364.60x = 182,046.90 × 74,125.40
  4. Step 4: Simplify right side
    121,364.60x = 13,494,299,281.26
  5. Step 5: Solve for x
    x = 13,494,299,281.26/121,364.60
  6. Step 6: Final answer
    x = 111,188.10

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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.