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Finding the Fourth Proportional to 57,869.01, 86,781.49 and 20,422.10

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Solution

The fourth proportional to 57,869.01, 86,781.49 and 20,422.10 is: 30,625.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,869.01 : 86,781.49 = 20,422.10 : x
  2. Step 2: Convert to fraction form
    57,869.01/86,781.49 = 20,422.10/x
  3. Step 3: Cross multiply
    57,869.01x = 86,781.49 × 20,422.10
  4. Step 4: Simplify right side
    57,869.01x = 1,772,260,432.83
  5. Step 5: Solve for x
    x = 1,772,260,432.83/57,869.01
  6. Step 6: Final answer
    x = 30,625.38

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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.