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Finding the Fourth Proportional to 154,129.80, 231,194.70 and 69,930.30

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Solution

The fourth proportional to 154,129.80, 231,194.70 and 69,930.30 is: 104,895.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,129.80 : 231,194.70 = 69,930.30 : x
  2. Step 2: Convert to fraction form
    154,129.80/231,194.70 = 69,930.30/x
  3. Step 3: Cross multiply
    154,129.80x = 231,194.70 × 69,930.30
  4. Step 4: Simplify right side
    154,129.80x = 16,167,514,729.41
  5. Step 5: Solve for x
    x = 16,167,514,729.41/154,129.80
  6. Step 6: Final answer
    x = 104,895.45

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1.5x scale

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.