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Finding the Fourth Proportional to 96,563.20, 144,844.80 and 81,011.20

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Solution

The fourth proportional to 96,563.20, 144,844.80 and 81,011.20 is: 121,516.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,563.20 : 144,844.80 = 81,011.20 : x
  2. Step 2: Convert to fraction form
    96,563.20/144,844.80 = 81,011.20/x
  3. Step 3: Cross multiply
    96,563.20x = 144,844.80 × 81,011.20
  4. Step 4: Simplify right side
    96,563.20x = 11,734,051,061.76
  5. Step 5: Solve for x
    x = 11,734,051,061.76/96,563.20
  6. Step 6: Final answer
    x = 121,516.80

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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.