Home / 72,378.75-108,569.63-19,787.91

Finding the Fourth Proportional to 72,378.75, 108,569.63 and 19,787.91

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Solution

The fourth proportional to 72,378.75, 108,569.63 and 19,787.91 is: 29,682.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,378.75 : 108,569.63 = 19,787.91 : x
  2. Step 2: Convert to fraction form
    72,378.75/108,569.63 = 19,787.91/x
  3. Step 3: Cross multiply
    72,378.75x = 108,569.63 × 19,787.91
  4. Step 4: Simplify right side
    72,378.75x = 2,148,365,474.86
  5. Step 5: Solve for x
    x = 2,148,365,474.86/72,378.75
  6. Step 6: Final answer
    x = 29,682.27

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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.