Home / 120,853.60-181,280.40-78,863.20

Finding the Fourth Proportional to 120,853.60, 181,280.40 and 78,863.20

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Solution

The fourth proportional to 120,853.60, 181,280.40 and 78,863.20 is: 118,294.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,853.60 : 181,280.40 = 78,863.20 : x
  2. Step 2: Convert to fraction form
    120,853.60/181,280.40 = 78,863.20/x
  3. Step 3: Cross multiply
    120,853.60x = 181,280.40 × 78,863.20
  4. Step 4: Simplify right side
    120,853.60x = 14,296,352,441.28
  5. Step 5: Solve for x
    x = 14,296,352,441.28/120,853.60
  6. Step 6: Final answer
    x = 118,294.80

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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.