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Finding the Fourth Proportional to 52,700.20, 72,728.08 and 28,826.87

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Solution

The fourth proportional to 52,700.20, 72,728.08 and 28,826.87 is: 39,782.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,700.20 : 72,728.08 = 28,826.87 : x
  2. Step 2: Convert to fraction form
    52,700.20/72,728.08 = 28,826.87/x
  3. Step 3: Cross multiply
    52,700.20x = 72,728.08 × 28,826.87
  4. Step 4: Simplify right side
    52,700.20x = 2,096,522,471.80
  5. Step 5: Solve for x
    x = 2,096,522,471.80/52,700.20
  6. Step 6: Final answer
    x = 39,782.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.