Home / 121,089.60-181,742.40-71,107.20

Finding the Fourth Proportional to 121,089.60, 181,742.40 and 71,107.20

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Solution

The fourth proportional to 121,089.60, 181,742.40 and 71,107.20 is: 106,724.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,089.60 : 181,742.40 = 71,107.20 : x
  2. Step 2: Convert to fraction form
    121,089.60/181,742.40 = 71,107.20/x
  3. Step 3: Cross multiply
    121,089.60x = 181,742.40 × 71,107.20
  4. Step 4: Simplify right side
    121,089.60x = 12,923,193,185.28
  5. Step 5: Solve for x
    x = 12,923,193,185.28/121,089.60
  6. Step 6: Final answer
    x = 106,724.22

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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.