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Finding the Fourth Proportional to 96,339.80, 144,855.30 and 81,133.40

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Solution

The fourth proportional to 96,339.80, 144,855.30 and 81,133.40 is: 121,991.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,339.80 : 144,855.30 = 81,133.40 : x
  2. Step 2: Convert to fraction form
    96,339.80/144,855.30 = 81,133.40/x
  3. Step 3: Cross multiply
    96,339.80x = 144,855.30 × 81,133.40
  4. Step 4: Simplify right side
    96,339.80x = 11,752,602,997.02
  5. Step 5: Solve for x
    x = 11,752,602,997.02/96,339.80
  6. Step 6: Final answer
    x = 121,991.15

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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.