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Finding the Fourth Proportional to 96,868.60, 145,302.90 and 85,204.60

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Solution

The fourth proportional to 96,868.60, 145,302.90 and 85,204.60 is: 127,806.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,868.60 : 145,302.90 = 85,204.60 : x
  2. Step 2: Convert to fraction form
    96,868.60/145,302.90 = 85,204.60/x
  3. Step 3: Cross multiply
    96,868.60x = 145,302.90 × 85,204.60
  4. Step 4: Simplify right side
    96,868.60x = 12,380,475,473.34
  5. Step 5: Solve for x
    x = 12,380,475,473.34/96,868.60
  6. Step 6: Final answer
    x = 127,806.90

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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.