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Finding the Fourth Proportional to 120,590.40, 180,885.60 and 115,471.20

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Solution

The fourth proportional to 120,590.40, 180,885.60 and 115,471.20 is: 173,206.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,590.40 : 180,885.60 = 115,471.20 : x
  2. Step 2: Convert to fraction form
    120,590.40/180,885.60 = 115,471.20/x
  3. Step 3: Cross multiply
    120,590.40x = 180,885.60 × 115,471.20
  4. Step 4: Simplify right side
    120,590.40x = 20,887,077,294.72
  5. Step 5: Solve for x
    x = 20,887,077,294.72/120,590.40
  6. Step 6: Final answer
    x = 173,206.80

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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.