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Finding the Fourth Proportional to 67,608.81, 101,205.62 and 42,531.45

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Solution

The fourth proportional to 67,608.81, 101,205.62 and 42,531.45 is: 63,666.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,608.81 : 101,205.62 = 42,531.45 : x
  2. Step 2: Convert to fraction form
    67,608.81/101,205.62 = 42,531.45/x
  3. Step 3: Cross multiply
    67,608.81x = 101,205.62 × 42,531.45
  4. Step 4: Simplify right side
    67,608.81x = 4,304,421,766.75
  5. Step 5: Solve for x
    x = 4,304,421,766.75/67,608.81
  6. Step 6: Final answer
    x = 63,666.58

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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.