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Finding the Fourth Proportional to 71,905.58, 107,868.09 and 67,531.58

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Solution

The fourth proportional to 71,905.58, 107,868.09 and 67,531.58 is: 101,306.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,905.58 : 107,868.09 = 67,531.58 : x
  2. Step 2: Convert to fraction form
    71,905.58/107,868.09 = 67,531.58/x
  3. Step 3: Cross multiply
    71,905.58x = 107,868.09 × 67,531.58
  4. Step 4: Simplify right side
    71,905.58x = 7,284,502,549.28
  5. Step 5: Solve for x
    x = 7,284,502,549.28/71,905.58
  6. Step 6: Final answer
    x = 101,306.50

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1.5x scale

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.