Home / 72,902.57-109,382.40-28,521.72

Finding the Fourth Proportional to 72,902.57, 109,382.40 and 28,521.72

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Solution

The fourth proportional to 72,902.57, 109,382.40 and 28,521.72 is: 42,793.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,902.57 : 109,382.40 = 28,521.72 : x
  2. Step 2: Convert to fraction form
    72,902.57/109,382.40 = 28,521.72/x
  3. Step 3: Cross multiply
    72,902.57x = 109,382.40 × 28,521.72
  4. Step 4: Simplify right side
    72,902.57x = 3,119,774,185.73
  5. Step 5: Solve for x
    x = 3,119,774,185.73/72,902.57
  6. Step 6: Final answer
    x = 42,793.75

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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.