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Finding the Fourth Proportional to 72,521.73, 108,754.92 and 28,142.73

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Solution

The fourth proportional to 72,521.73, 108,754.92 and 28,142.73 is: 42,203.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,521.73 : 108,754.92 = 28,142.73 : x
  2. Step 2: Convert to fraction form
    72,521.73/108,754.92 = 28,142.73/x
  3. Step 3: Cross multiply
    72,521.73x = 108,754.92 × 28,142.73
  4. Step 4: Simplify right side
    72,521.73x = 3,060,660,349.73
  5. Step 5: Solve for x
    x = 3,060,660,349.73/72,521.73
  6. Step 6: Final answer
    x = 42,203.36

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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.