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Finding the Fourth Proportional to 120,858.60, 181,115.10 and 89,020.20

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Solution

The fourth proportional to 120,858.60, 181,115.10 and 89,020.20 is: 133,403.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,858.60 : 181,115.10 = 89,020.20 : x
  2. Step 2: Convert to fraction form
    120,858.60/181,115.10 = 89,020.20/x
  3. Step 3: Cross multiply
    120,858.60x = 181,115.10 × 89,020.20
  4. Step 4: Simplify right side
    120,858.60x = 16,122,902,425.02
  5. Step 5: Solve for x
    x = 16,122,902,425.02/120,858.60
  6. Step 6: Final answer
    x = 133,403.02

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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.