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Finding the Fourth Proportional to 83,700.74, 115,489.05 and 49,720.69

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Solution

The fourth proportional to 83,700.74, 115,489.05 and 49,720.69 is: 68,603.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,700.74 : 115,489.05 = 49,720.69 : x
  2. Step 2: Convert to fraction form
    83,700.74/115,489.05 = 49,720.69/x
  3. Step 3: Cross multiply
    83,700.74x = 115,489.05 × 49,720.69
  4. Step 4: Simplify right side
    83,700.74x = 5,742,194,676.00
  5. Step 5: Solve for x
    x = 5,742,194,676.00/83,700.74
  6. Step 6: Final answer
    x = 68,603.87

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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.