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Finding the Fourth Proportional to 57,287.53, 85,920.18 and 28,816.90

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Solution

The fourth proportional to 57,287.53, 85,920.18 and 28,816.90 is: 43,219.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,287.53 : 85,920.18 = 28,816.90 : x
  2. Step 2: Convert to fraction form
    57,287.53/85,920.18 = 28,816.90/x
  3. Step 3: Cross multiply
    57,287.53x = 85,920.18 × 28,816.90
  4. Step 4: Simplify right side
    57,287.53x = 2,475,953,235.04
  5. Step 5: Solve for x
    x = 2,475,953,235.04/57,287.53
  6. Step 6: Final answer
    x = 43,219.76

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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.