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Finding the Fourth Proportional to 100,896.74, 139,247.32 and 75,358.76

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Solution

The fourth proportional to 100,896.74, 139,247.32 and 75,358.76 is: 104,002.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,896.74 : 139,247.32 = 75,358.76 : x
  2. Step 2: Convert to fraction form
    100,896.74/139,247.32 = 75,358.76/x
  3. Step 3: Cross multiply
    100,896.74x = 139,247.32 × 75,358.76
  4. Step 4: Simplify right side
    100,896.74x = 10,493,505,368.52
  5. Step 5: Solve for x
    x = 10,493,505,368.52/100,896.74
  6. Step 6: Final answer
    x = 104,002.43

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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.