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Finding the Fourth Proportional to 120,420.27, 180,531.72 and 45,497.79

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Solution

The fourth proportional to 120,420.27, 180,531.72 and 45,497.79 is: 68,209.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,420.27 : 180,531.72 = 45,497.79 : x
  2. Step 2: Convert to fraction form
    120,420.27/180,531.72 = 45,497.79/x
  3. Step 3: Cross multiply
    120,420.27x = 180,531.72 × 45,497.79
  4. Step 4: Simplify right side
    120,420.27x = 8,213,794,284.90
  5. Step 5: Solve for x
    x = 8,213,794,284.90/120,420.27
  6. Step 6: Final answer
    x = 68,209.40

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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.