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Finding the Fourth Proportional to 76,761.70, 115,250.16 and 39,348.61

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Solution

The fourth proportional to 76,761.70, 115,250.16 and 39,348.61 is: 59,078.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,761.70 : 115,250.16 = 39,348.61 : x
  2. Step 2: Convert to fraction form
    76,761.70/115,250.16 = 39,348.61/x
  3. Step 3: Cross multiply
    76,761.70x = 115,250.16 × 39,348.61
  4. Step 4: Simplify right side
    76,761.70x = 4,534,933,598.28
  5. Step 5: Solve for x
    x = 4,534,933,598.28/76,761.70
  6. Step 6: Final answer
    x = 59,078.08

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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.