Home / 80,698.50-121,222.89-68,243.52

Finding the Fourth Proportional to 80,698.50, 121,222.89 and 68,243.52

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Solution

The fourth proportional to 80,698.50, 121,222.89 and 68,243.52 is: 102,513.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,698.50 : 121,222.89 = 68,243.52 : x
  2. Step 2: Convert to fraction form
    80,698.50/121,222.89 = 68,243.52/x
  3. Step 3: Cross multiply
    80,698.50x = 121,222.89 × 68,243.52
  4. Step 4: Simplify right side
    80,698.50x = 8,272,676,718.17
  5. Step 5: Solve for x
    x = 8,272,676,718.17/80,698.50
  6. Step 6: Final answer
    x = 102,513.39

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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.