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Finding the Fourth Proportional to 121,410.60, 182,115.90 and 74,689.80

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Solution

The fourth proportional to 121,410.60, 182,115.90 and 74,689.80 is: 112,034.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,410.60 : 182,115.90 = 74,689.80 : x
  2. Step 2: Convert to fraction form
    121,410.60/182,115.90 = 74,689.80/x
  3. Step 3: Cross multiply
    121,410.60x = 182,115.90 × 74,689.80
  4. Step 4: Simplify right side
    121,410.60x = 13,602,200,147.82
  5. Step 5: Solve for x
    x = 13,602,200,147.82/121,410.60
  6. Step 6: Final answer
    x = 112,034.70

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1.5x scale

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.