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Finding the Fourth Proportional to 67,615.80, 100,982.55 and 57,512.87

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Solution

The fourth proportional to 67,615.80, 100,982.55 and 57,512.87 is: 85,894.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,615.80 : 100,982.55 = 57,512.87 : x
  2. Step 2: Convert to fraction form
    67,615.80/100,982.55 = 57,512.87/x
  3. Step 3: Cross multiply
    67,615.80x = 100,982.55 × 57,512.87
  4. Step 4: Simplify right side
    67,615.80x = 5,807,796,270.42
  5. Step 5: Solve for x
    x = 5,807,796,270.42/67,615.80
  6. Step 6: Final answer
    x = 85,894.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.