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Finding the Fourth Proportional to 121,364.10, 182,046.15 and 74,124.90

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Solution

The fourth proportional to 121,364.10, 182,046.15 and 74,124.90 is: 111,187.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,364.10 : 182,046.15 = 74,124.90 : x
  2. Step 2: Convert to fraction form
    121,364.10/182,046.15 = 74,124.90/x
  3. Step 3: Cross multiply
    121,364.10x = 182,046.15 × 74,124.90
  4. Step 4: Simplify right side
    121,364.10x = 13,494,152,664.14
  5. Step 5: Solve for x
    x = 13,494,152,664.14/121,364.10
  6. Step 6: Final answer
    x = 111,187.35

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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.