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Finding the Fourth Proportional to 83,960.68, 115,860.90 and 50,420.20

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Solution

The fourth proportional to 83,960.68, 115,860.90 and 50,420.20 is: 69,576.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,960.68 : 115,860.90 = 50,420.20 : x
  2. Step 2: Convert to fraction form
    83,960.68/115,860.90 = 50,420.20/x
  3. Step 3: Cross multiply
    83,960.68x = 115,860.90 × 50,420.20
  4. Step 4: Simplify right side
    83,960.68x = 5,841,729,750.18
  5. Step 5: Solve for x
    x = 5,841,729,750.18/83,960.68
  6. Step 6: Final answer
    x = 69,576.97

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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.