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Finding the Fourth Proportional to 72,854.61, 109,217.08 and 28,471.27

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Solution

The fourth proportional to 72,854.61, 109,217.08 and 28,471.27 is: 42,681.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,854.61 : 109,217.08 = 28,471.27 : x
  2. Step 2: Convert to fraction form
    72,854.61/109,217.08 = 28,471.27/x
  3. Step 3: Cross multiply
    72,854.61x = 109,217.08 × 28,471.27
  4. Step 4: Simplify right side
    72,854.61x = 3,109,548,735.84
  5. Step 5: Solve for x
    x = 3,109,548,735.84/72,854.61
  6. Step 6: Final answer
    x = 42,681.56

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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.