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Finding the Fourth Proportional to 111,471.78, 153,828.96 and 63,073.20

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Solution

The fourth proportional to 111,471.78, 153,828.96 and 63,073.20 is: 87,039.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,471.78 : 153,828.96 = 63,073.20 : x
  2. Step 2: Convert to fraction form
    111,471.78/153,828.96 = 63,073.20/x
  3. Step 3: Cross multiply
    111,471.78x = 153,828.96 × 63,073.20
  4. Step 4: Simplify right side
    111,471.78x = 9,702,484,759.87
  5. Step 5: Solve for x
    x = 9,702,484,759.87/111,471.78
  6. Step 6: Final answer
    x = 87,039.83

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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.