Home / 81,133.26-121,693.80-28,543.20

Finding the Fourth Proportional to 81,133.26, 121,693.80 and 28,543.20

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Solution

The fourth proportional to 81,133.26, 121,693.80 and 28,543.20 is: 42,812.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,133.26 : 121,693.80 = 28,543.20 : x
  2. Step 2: Convert to fraction form
    81,133.26/121,693.80 = 28,543.20/x
  3. Step 3: Cross multiply
    81,133.26x = 121,693.80 × 28,543.20
  4. Step 4: Simplify right side
    81,133.26x = 3,473,530,472.16
  5. Step 5: Solve for x
    x = 3,473,530,472.16/81,133.26
  6. Step 6: Final answer
    x = 42,812.66

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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.