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Finding the Fourth Proportional to 100,813.91, 151,119.21 and 63,400.72

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Solution

The fourth proportional to 100,813.91, 151,119.21 and 63,400.72 is: 95,037.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,813.91 : 151,119.21 = 63,400.72 : x
  2. Step 2: Convert to fraction form
    100,813.91/151,119.21 = 63,400.72/x
  3. Step 3: Cross multiply
    100,813.91x = 151,119.21 × 63,400.72
  4. Step 4: Simplify right side
    100,813.91x = 9,581,066,719.83
  5. Step 5: Solve for x
    x = 9,581,066,719.83/100,813.91
  6. Step 6: Final answer
    x = 95,037.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.