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Finding the Fourth Proportional to 154,121.80, 231,029.10 and 70,870.60

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Solution

The fourth proportional to 154,121.80, 231,029.10 and 70,870.60 is: 106,235.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,121.80 : 231,029.10 = 70,870.60 : x
  2. Step 2: Convert to fraction form
    154,121.80/231,029.10 = 70,870.60/x
  3. Step 3: Cross multiply
    154,121.80x = 231,029.10 × 70,870.60
  4. Step 4: Simplify right side
    154,121.80x = 16,373,170,934.46
  5. Step 5: Solve for x
    x = 16,373,170,934.46/154,121.80
  6. Step 6: Final answer
    x = 106,235.27

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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.