Home / 81,225.07-121,542.36-67,053.31

Finding the Fourth Proportional to 81,225.07, 121,542.36 and 67,053.31

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Solution

The fourth proportional to 81,225.07, 121,542.36 and 67,053.31 is: 100,336.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,225.07 : 121,542.36 = 67,053.31 : x
  2. Step 2: Convert to fraction form
    81,225.07/121,542.36 = 67,053.31/x
  3. Step 3: Cross multiply
    81,225.07x = 121,542.36 × 67,053.31
  4. Step 4: Simplify right side
    81,225.07x = 8,149,817,543.21
  5. Step 5: Solve for x
    x = 8,149,817,543.21/81,225.07
  6. Step 6: Final answer
    x = 100,336.23

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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.