Home / 121,261.11-167,280.15-81,028.83

Finding the Fourth Proportional to 121,261.11, 167,280.15 and 81,028.83

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Solution

The fourth proportional to 121,261.11, 167,280.15 and 81,028.83 is: 111,779.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,261.11 : 167,280.15 = 81,028.83 : x
  2. Step 2: Convert to fraction form
    121,261.11/167,280.15 = 81,028.83/x
  3. Step 3: Cross multiply
    121,261.11x = 167,280.15 × 81,028.83
  4. Step 4: Simplify right side
    121,261.11x = 13,554,514,836.72
  5. Step 5: Solve for x
    x = 13,554,514,836.72/121,261.11
  6. Step 6: Final answer
    x = 111,779.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.