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Finding the Fourth Proportional to 57,081.25, 78,766.74 and 38,646.85

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Solution

The fourth proportional to 57,081.25, 78,766.74 and 38,646.85 is: 53,329.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,081.25 : 78,766.74 = 38,646.85 : x
  2. Step 2: Convert to fraction form
    57,081.25/78,766.74 = 38,646.85/x
  3. Step 3: Cross multiply
    57,081.25x = 78,766.74 × 38,646.85
  4. Step 4: Simplify right side
    57,081.25x = 3,044,086,385.77
  5. Step 5: Solve for x
    x = 3,044,086,385.77/57,081.25
  6. Step 6: Final answer
    x = 53,329.01

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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.