Home / 100,929.76-139,283.08-58,512.90

Finding the Fourth Proportional to 100,929.76, 139,283.08 and 58,512.90

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Solution

The fourth proportional to 100,929.76, 139,283.08 and 58,512.90 is: 80,747.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,929.76 : 139,283.08 = 58,512.90 : x
  2. Step 2: Convert to fraction form
    100,929.76/139,283.08 = 58,512.90/x
  3. Step 3: Cross multiply
    100,929.76x = 139,283.08 × 58,512.90
  4. Step 4: Simplify right side
    100,929.76x = 8,149,856,931.73
  5. Step 5: Solve for x
    x = 8,149,856,931.73/100,929.76
  6. Step 6: Final answer
    x = 80,747.81

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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.