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Finding the Fourth Proportional to 123,785.55, 185,514.30 and 109,679.40

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Solution

The fourth proportional to 123,785.55, 185,514.30 and 109,679.40 is: 164,373.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,785.55 : 185,514.30 = 109,679.40 : x
  2. Step 2: Convert to fraction form
    123,785.55/185,514.30 = 109,679.40/x
  3. Step 3: Cross multiply
    123,785.55x = 185,514.30 × 109,679.40
  4. Step 4: Simplify right side
    123,785.55x = 20,347,097,115.42
  5. Step 5: Solve for x
    x = 20,347,097,115.42/123,785.55
  6. Step 6: Final answer
    x = 164,373.77

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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.