Home / 121,147.20-181,893.60-91,771.20

Finding the Fourth Proportional to 121,147.20, 181,893.60 and 91,771.20

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Solution

The fourth proportional to 121,147.20, 181,893.60 and 91,771.20 is: 137,787.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,147.20 : 181,893.60 = 91,771.20 : x
  2. Step 2: Convert to fraction form
    121,147.20/181,893.60 = 91,771.20/x
  3. Step 3: Cross multiply
    121,147.20x = 181,893.60 × 91,771.20
  4. Step 4: Simplify right side
    121,147.20x = 16,692,593,944.32
  5. Step 5: Solve for x
    x = 16,692,593,944.32/121,147.20
  6. Step 6: Final answer
    x = 137,787.70

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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.