Home / 100,761.12-139,070.23-57,769.49

Finding the Fourth Proportional to 100,761.12, 139,070.23 and 57,769.49

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Solution

The fourth proportional to 100,761.12, 139,070.23 and 57,769.49 is: 79,733.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,761.12 : 139,070.23 = 57,769.49 : x
  2. Step 2: Convert to fraction form
    100,761.12/139,070.23 = 57,769.49/x
  3. Step 3: Cross multiply
    100,761.12x = 139,070.23 × 57,769.49
  4. Step 4: Simplify right side
    100,761.12x = 8,034,016,261.28
  5. Step 5: Solve for x
    x = 8,034,016,261.28/100,761.12
  6. Step 6: Final answer
    x = 79,733.30

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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.