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Finding the Fourth Proportional to 120,825.60, 181,065.60 and 88,987.20

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Solution

The fourth proportional to 120,825.60, 181,065.60 and 88,987.20 is: 133,353.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,825.60 : 181,065.60 = 88,987.20 : x
  2. Step 2: Convert to fraction form
    120,825.60/181,065.60 = 88,987.20/x
  3. Step 3: Cross multiply
    120,825.60x = 181,065.60 × 88,987.20
  4. Step 4: Simplify right side
    120,825.60x = 16,112,520,760.32
  5. Step 5: Solve for x
    x = 16,112,520,760.32/120,825.60
  6. Step 6: Final answer
    x = 133,353.53

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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.