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Finding the Fourth Proportional to 107,404.85, 161,279.40 and 85,401.20

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Solution

The fourth proportional to 107,404.85, 161,279.40 and 85,401.20 is: 128,238.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,404.85 : 161,279.40 = 85,401.20 : x
  2. Step 2: Convert to fraction form
    107,404.85/161,279.40 = 85,401.20/x
  3. Step 3: Cross multiply
    107,404.85x = 161,279.40 × 85,401.20
  4. Step 4: Simplify right side
    107,404.85x = 13,773,454,295.28
  5. Step 5: Solve for x
    x = 13,773,454,295.28/107,404.85
  6. Step 6: Final answer
    x = 128,238.66

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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.