Home / 130,721.12-180,354-74,121.56

Finding the Fourth Proportional to 130,721.12, 180,354 and 74,121.56

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Solution

The fourth proportional to 130,721.12, 180,354 and 74,121.56 is: 102,264.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,721.12 : 180,354 = 74,121.56 : x
  2. Step 2: Convert to fraction form
    130,721.12/180,354 = 74,121.56/x
  3. Step 3: Cross multiply
    130,721.12x = 180,354 × 74,121.56
  4. Step 4: Simplify right side
    130,721.12x = 13,368,119,832.24
  5. Step 5: Solve for x
    x = 13,368,119,832.24/130,721.12
  6. Step 6: Final answer
    x = 102,264.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.