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Finding the Fourth Proportional to 144,854.60, 217,281.90 and 85,659.80

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Solution

The fourth proportional to 144,854.60, 217,281.90 and 85,659.80 is: 128,489.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,854.60 : 217,281.90 = 85,659.80 : x
  2. Step 2: Convert to fraction form
    144,854.60/217,281.90 = 85,659.80/x
  3. Step 3: Cross multiply
    144,854.60x = 217,281.90 × 85,659.80
  4. Step 4: Simplify right side
    144,854.60x = 18,612,324,097.62
  5. Step 5: Solve for x
    x = 18,612,324,097.62/144,854.60
  6. Step 6: Final answer
    x = 128,489.70

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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.