Home / 100,929.24-139,282.74-58,512.78

Finding the Fourth Proportional to 100,929.24, 139,282.74 and 58,512.78

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Solution

The fourth proportional to 100,929.24, 139,282.74 and 58,512.78 is: 80,747.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,929.24 : 139,282.74 = 58,512.78 : x
  2. Step 2: Convert to fraction form
    100,929.24/139,282.74 = 58,512.78/x
  3. Step 3: Cross multiply
    100,929.24x = 139,282.74 × 58,512.78
  4. Step 4: Simplify right side
    100,929.24x = 8,149,820,323.42
  5. Step 5: Solve for x
    x = 8,149,820,323.42/100,929.24
  6. Step 6: Final answer
    x = 80,747.86

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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.