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Finding the Fourth Proportional to 99,245.40, 148,868.10 and 61,920.60

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Solution

The fourth proportional to 99,245.40, 148,868.10 and 61,920.60 is: 92,880.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,245.40 : 148,868.10 = 61,920.60 : x
  2. Step 2: Convert to fraction form
    99,245.40/148,868.10 = 61,920.60/x
  3. Step 3: Cross multiply
    99,245.40x = 148,868.10 × 61,920.60
  4. Step 4: Simplify right side
    99,245.40x = 9,218,002,072.86
  5. Step 5: Solve for x
    x = 9,218,002,072.86/99,245.40
  6. Step 6: Final answer
    x = 92,880.90

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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.