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Finding the Fourth Proportional to 67,686.75, 101,530.13 and 18,438.75

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Solution

The fourth proportional to 67,686.75, 101,530.13 and 18,438.75 is: 27,658.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,686.75 : 101,530.13 = 18,438.75 : x
  2. Step 2: Convert to fraction form
    67,686.75/101,530.13 = 18,438.75/x
  3. Step 3: Cross multiply
    67,686.75x = 101,530.13 × 18,438.75
  4. Step 4: Simplify right side
    67,686.75x = 1,872,088,592.34
  5. Step 5: Solve for x
    x = 1,872,088,592.34/67,686.75
  6. Step 6: Final answer
    x = 27,658.13

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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.