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Finding the Fourth Proportional to 100,929.70, 139,299.36 and 58,512.76

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Solution

The fourth proportional to 100,929.70, 139,299.36 and 58,512.76 is: 80,757.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,929.70 : 139,299.36 = 58,512.76 : x
  2. Step 2: Convert to fraction form
    100,929.70/139,299.36 = 58,512.76/x
  3. Step 3: Cross multiply
    100,929.70x = 139,299.36 × 58,512.76
  4. Step 4: Simplify right side
    100,929.70x = 8,150,790,019.83
  5. Step 5: Solve for x
    x = 8,150,790,019.83/100,929.70
  6. Step 6: Final answer
    x = 80,757.10

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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.