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Finding the Fourth Proportional to 85,616.60, 128,424.90 and 23,287.10

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Solution

The fourth proportional to 85,616.60, 128,424.90 and 23,287.10 is: 34,930.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,616.60 : 128,424.90 = 23,287.10 : x
  2. Step 2: Convert to fraction form
    85,616.60/128,424.90 = 23,287.10/x
  3. Step 3: Cross multiply
    85,616.60x = 128,424.90 × 23,287.10
  4. Step 4: Simplify right side
    85,616.60x = 2,990,643,488.79
  5. Step 5: Solve for x
    x = 2,990,643,488.79/85,616.60
  6. Step 6: Final answer
    x = 34,930.65

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Similar ratio
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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.