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Finding the Fourth Proportional to 67,706.80, 93,422.92 and 39,421.68

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Solution

The fourth proportional to 67,706.80, 93,422.92 and 39,421.68 is: 54,394.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,706.80 : 93,422.92 = 39,421.68 : x
  2. Step 2: Convert to fraction form
    67,706.80/93,422.92 = 39,421.68/x
  3. Step 3: Cross multiply
    67,706.80x = 93,422.92 × 39,421.68
  4. Step 4: Simplify right side
    67,706.80x = 3,682,888,456.91
  5. Step 5: Solve for x
    x = 3,682,888,456.91/67,706.80
  6. Step 6: Final answer
    x = 54,394.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.