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Finding the Fourth Proportional to 72,991.88, 109,487.82 and 17,587.88

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Solution

The fourth proportional to 72,991.88, 109,487.82 and 17,587.88 is: 26,381.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,991.88 : 109,487.82 = 17,587.88 : x
  2. Step 2: Convert to fraction form
    72,991.88/109,487.82 = 17,587.88/x
  3. Step 3: Cross multiply
    72,991.88x = 109,487.82 × 17,587.88
  4. Step 4: Simplify right side
    72,991.88x = 1,925,658,639.62
  5. Step 5: Solve for x
    x = 1,925,658,639.62/72,991.88
  6. Step 6: Final answer
    x = 26,381.82

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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.