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Finding the Fourth Proportional to 121,423.60, 182,135.40 and 74,184.40

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Solution

The fourth proportional to 121,423.60, 182,135.40 and 74,184.40 is: 111,276.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,423.60 : 182,135.40 = 74,184.40 : x
  2. Step 2: Convert to fraction form
    121,423.60/182,135.40 = 74,184.40/x
  3. Step 3: Cross multiply
    121,423.60x = 182,135.40 × 74,184.40
  4. Step 4: Simplify right side
    121,423.60x = 13,511,605,367.76
  5. Step 5: Solve for x
    x = 13,511,605,367.76/121,423.60
  6. Step 6: Final answer
    x = 111,276.60

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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.