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Finding the Fourth Proportional to 96,912.80, 145,425.60 and 40,748.80

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Solution

The fourth proportional to 96,912.80, 145,425.60 and 40,748.80 is: 61,146.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,912.80 : 145,425.60 = 40,748.80 : x
  2. Step 2: Convert to fraction form
    96,912.80/145,425.60 = 40,748.80/x
  3. Step 3: Cross multiply
    96,912.80x = 145,425.60 × 40,748.80
  4. Step 4: Simplify right side
    96,912.80x = 5,925,918,689.28
  5. Step 5: Solve for x
    x = 5,925,918,689.28/96,912.80
  6. Step 6: Final answer
    x = 61,146.91

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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.