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Finding the Fourth Proportional to 85,980.92, 118,711.49 and 65,801.75

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Solution

The fourth proportional to 85,980.92, 118,711.49 and 65,801.75 is: 90,850.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,980.92 : 118,711.49 = 65,801.75 : x
  2. Step 2: Convert to fraction form
    85,980.92/118,711.49 = 65,801.75/x
  3. Step 3: Cross multiply
    85,980.92x = 118,711.49 × 65,801.75
  4. Step 4: Simplify right side
    85,980.92x = 7,811,422,864.54
  5. Step 5: Solve for x
    x = 7,811,422,864.54/85,980.92
  6. Step 6: Final answer
    x = 90,850.66

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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.