Home / 77,057.18-115,609.38-69,109.46

Finding the Fourth Proportional to 77,057.18, 115,609.38 and 69,109.46

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Solution

The fourth proportional to 77,057.18, 115,609.38 and 69,109.46 is: 103,685.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,057.18 : 115,609.38 = 69,109.46 : x
  2. Step 2: Convert to fraction form
    77,057.18/115,609.38 = 69,109.46/x
  3. Step 3: Cross multiply
    77,057.18x = 115,609.38 × 69,109.46
  4. Step 4: Simplify right side
    77,057.18x = 7,989,701,822.73
  5. Step 5: Solve for x
    x = 7,989,701,822.73/77,057.18
  6. Step 6: Final answer
    x = 103,685.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.