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Finding the Fourth Proportional to 85,610.71, 118,169.85 and 58,790.80

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Solution

The fourth proportional to 85,610.71, 118,169.85 and 58,790.80 is: 81,149.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,610.71 : 118,169.85 = 58,790.80 : x
  2. Step 2: Convert to fraction form
    85,610.71/118,169.85 = 58,790.80/x
  3. Step 3: Cross multiply
    85,610.71x = 118,169.85 × 58,790.80
  4. Step 4: Simplify right side
    85,610.71x = 6,947,300,017.38
  5. Step 5: Solve for x
    x = 6,947,300,017.38/85,610.71
  6. Step 6: Final answer
    x = 81,149.89

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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.