Home / 131,513.68-197,320.18-78,959.80

Finding the Fourth Proportional to 131,513.68, 197,320.18 and 78,959.80

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Solution

The fourth proportional to 131,513.68, 197,320.18 and 78,959.80 is: 118,469.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,513.68 : 197,320.18 = 78,959.80 : x
  2. Step 2: Convert to fraction form
    131,513.68/197,320.18 = 78,959.80/x
  3. Step 3: Cross multiply
    131,513.68x = 197,320.18 × 78,959.80
  4. Step 4: Simplify right side
    131,513.68x = 15,580,361,948.76
  5. Step 5: Solve for x
    x = 15,580,361,948.76/131,513.68
  6. Step 6: Final answer
    x = 118,469.52

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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.