Home / 144,435.60-216,781.40-85,197.20

Finding the Fourth Proportional to 144,435.60, 216,781.40 and 85,197.20

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Solution

The fourth proportional to 144,435.60, 216,781.40 and 85,197.20 is: 127,871.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,435.60 : 216,781.40 = 85,197.20 : x
  2. Step 2: Convert to fraction form
    144,435.60/216,781.40 = 85,197.20/x
  3. Step 3: Cross multiply
    144,435.60x = 216,781.40 × 85,197.20
  4. Step 4: Simplify right side
    144,435.60x = 18,469,168,292.08
  5. Step 5: Solve for x
    x = 18,469,168,292.08/144,435.60
  6. Step 6: Final answer
    x = 127,871.30

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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.