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Finding the Fourth Proportional to 148,886.80, 205,463.40 and 80,903.78

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Solution

The fourth proportional to 148,886.80, 205,463.40 and 80,903.78 is: 111,647.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,886.80 : 205,463.40 = 80,903.78 : x
  2. Step 2: Convert to fraction form
    148,886.80/205,463.40 = 80,903.78/x
  3. Step 3: Cross multiply
    148,886.80x = 205,463.40 × 80,903.78
  4. Step 4: Simplify right side
    148,886.80x = 16,622,765,711.65
  5. Step 5: Solve for x
    x = 16,622,765,711.65/148,886.80
  6. Step 6: Final answer
    x = 111,647.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.