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Finding the Fourth Proportional to 144,909.60, 217,263.15 and 85,714.80

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Solution

The fourth proportional to 144,909.60, 217,263.15 and 85,714.80 is: 128,512.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,909.60 : 217,263.15 = 85,714.80 : x
  2. Step 2: Convert to fraction form
    144,909.60/217,263.15 = 85,714.80/x
  3. Step 3: Cross multiply
    144,909.60x = 217,263.15 × 85,714.80
  4. Step 4: Simplify right side
    144,909.60x = 18,622,667,449.62
  5. Step 5: Solve for x
    x = 18,622,667,449.62/144,909.60
  6. Step 6: Final answer
    x = 128,512.31

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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.