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Finding the Fourth Proportional to 99,013.61, 148,367.52 and 66,866.69

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Solution

The fourth proportional to 99,013.61, 148,367.52 and 66,866.69 is: 100,196.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,013.61 : 148,367.52 = 66,866.69 : x
  2. Step 2: Convert to fraction form
    99,013.61/148,367.52 = 66,866.69/x
  3. Step 3: Cross multiply
    99,013.61x = 148,367.52 × 66,866.69
  4. Step 4: Simplify right side
    99,013.61x = 9,920,844,224.07
  5. Step 5: Solve for x
    x = 9,920,844,224.07/99,013.61
  6. Step 6: Final answer
    x = 100,196.78

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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.