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Finding the Fourth Proportional to 79,887.90, 119,708.67 and 39,314.85

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Solution

The fourth proportional to 79,887.90, 119,708.67 and 39,314.85 is: 58,911.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,887.90 : 119,708.67 = 39,314.85 : x
  2. Step 2: Convert to fraction form
    79,887.90/119,708.67 = 39,314.85/x
  3. Step 3: Cross multiply
    79,887.90x = 119,708.67 × 39,314.85
  4. Step 4: Simplify right side
    79,887.90x = 4,706,328,404.75
  5. Step 5: Solve for x
    x = 4,706,328,404.75/79,887.90
  6. Step 6: Final answer
    x = 58,911.66

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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.