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Finding the Fourth Proportional to 120,825.60, 181,060.20 and 87,615.60

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Solution

The fourth proportional to 120,825.60, 181,060.20 and 87,615.60 is: 131,294.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,825.60 : 181,060.20 = 87,615.60 : x
  2. Step 2: Convert to fraction form
    120,825.60/181,060.20 = 87,615.60/x
  3. Step 3: Cross multiply
    120,825.60x = 181,060.20 × 87,615.60
  4. Step 4: Simplify right side
    120,825.60x = 15,863,698,059.12
  5. Step 5: Solve for x
    x = 15,863,698,059.12/120,825.60
  6. Step 6: Final answer
    x = 131,294.18

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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.