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Finding the Fourth Proportional to 64,862.12, 89,494.42 and 39,367.88

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Solution

The fourth proportional to 64,862.12, 89,494.42 and 39,367.88 is: 54,318.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,862.12 : 89,494.42 = 39,367.88 : x
  2. Step 2: Convert to fraction form
    64,862.12/89,494.42 = 39,367.88/x
  3. Step 3: Cross multiply
    64,862.12x = 89,494.42 × 39,367.88
  4. Step 4: Simplify right side
    64,862.12x = 3,523,205,587.23
  5. Step 5: Solve for x
    x = 3,523,205,587.23/64,862.12
  6. Step 6: Final answer
    x = 54,318.38

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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.