Home / 121,119.60-181,787.40-71,137.20

Finding the Fourth Proportional to 121,119.60, 181,787.40 and 71,137.20

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Solution

The fourth proportional to 121,119.60, 181,787.40 and 71,137.20 is: 106,769.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,119.60 : 181,787.40 = 71,137.20 : x
  2. Step 2: Convert to fraction form
    121,119.60/181,787.40 = 71,137.20/x
  3. Step 3: Cross multiply
    121,119.60x = 181,787.40 × 71,137.20
  4. Step 4: Simplify right side
    121,119.60x = 12,931,846,631.28
  5. Step 5: Solve for x
    x = 12,931,846,631.28/121,119.60
  6. Step 6: Final answer
    x = 106,769.23

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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.