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Finding the Fourth Proportional to 96,639.40, 144,843.90 and 40,479.40

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Solution

The fourth proportional to 96,639.40, 144,843.90 and 40,479.40 is: 60,670.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,639.40 : 144,843.90 = 40,479.40 : x
  2. Step 2: Convert to fraction form
    96,639.40/144,843.90 = 40,479.40/x
  3. Step 3: Cross multiply
    96,639.40x = 144,843.90 × 40,479.40
  4. Step 4: Simplify right side
    96,639.40x = 5,863,194,165.66
  5. Step 5: Solve for x
    x = 5,863,194,165.66/96,639.40
  6. Step 6: Final answer
    x = 60,670.85

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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.