Home / 100,791.52-139,098.06-57,778.18

Finding the Fourth Proportional to 100,791.52, 139,098.06 and 57,778.18

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Solution

The fourth proportional to 100,791.52, 139,098.06 and 57,778.18 is: 79,737.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,791.52 : 139,098.06 = 57,778.18 : x
  2. Step 2: Convert to fraction form
    100,791.52/139,098.06 = 57,778.18/x
  3. Step 3: Cross multiply
    100,791.52x = 139,098.06 × 57,778.18
  4. Step 4: Simplify right side
    100,791.52x = 8,036,832,748.33
  5. Step 5: Solve for x
    x = 8,036,832,748.33/100,791.52
  6. Step 6: Final answer
    x = 79,737.19

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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.