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Finding the Fourth Proportional to 67,780.88, 101,671.96 and 17,868.12

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Solution

The fourth proportional to 67,780.88, 101,671.96 and 17,868.12 is: 26,802.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,780.88 : 101,671.96 = 17,868.12 : x
  2. Step 2: Convert to fraction form
    67,780.88/101,671.96 = 17,868.12/x
  3. Step 3: Cross multiply
    67,780.88x = 101,671.96 × 17,868.12
  4. Step 4: Simplify right side
    67,780.88x = 1,816,686,781.92
  5. Step 5: Solve for x
    x = 1,816,686,781.92/67,780.88
  6. Step 6: Final answer
    x = 26,802.35

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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.