Home / 121,980.78-183,180.57-74,872.50

Finding the Fourth Proportional to 121,980.78, 183,180.57 and 74,872.50

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Solution

The fourth proportional to 121,980.78, 183,180.57 and 74,872.50 is: 112,437.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,980.78 : 183,180.57 = 74,872.50 : x
  2. Step 2: Convert to fraction form
    121,980.78/183,180.57 = 74,872.50/x
  3. Step 3: Cross multiply
    121,980.78x = 183,180.57 × 74,872.50
  4. Step 4: Simplify right side
    121,980.78x = 13,715,187,227.33
  5. Step 5: Solve for x
    x = 13,715,187,227.33/121,980.78
  6. Step 6: Final answer
    x = 112,437.28

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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.