Home / 121,278.50-181,696.09-87,915.82

Finding the Fourth Proportional to 121,278.50, 181,696.09 and 87,915.82

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Solution

The fourth proportional to 121,278.50, 181,696.09 and 87,915.82 is: 131,713.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,278.50 : 181,696.09 = 87,915.82 : x
  2. Step 2: Convert to fraction form
    121,278.50/181,696.09 = 87,915.82/x
  3. Step 3: Cross multiply
    121,278.50x = 181,696.09 × 87,915.82
  4. Step 4: Simplify right side
    121,278.50x = 15,973,960,743.14
  5. Step 5: Solve for x
    x = 15,973,960,743.14/121,278.50
  6. Step 6: Final answer
    x = 131,713.05

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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.