Home / 130,721.12-180,388.56-74,137.76

Finding the Fourth Proportional to 130,721.12, 180,388.56 and 74,137.76

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Solution

The fourth proportional to 130,721.12, 180,388.56 and 74,137.76 is: 102,306.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,721.12 : 180,388.56 = 74,137.76 : x
  2. Step 2: Convert to fraction form
    130,721.12/180,388.56 = 74,137.76/x
  3. Step 3: Cross multiply
    130,721.12x = 180,388.56 × 74,137.76
  4. Step 4: Simplify right side
    130,721.12x = 13,373,603,768.03
  5. Step 5: Solve for x
    x = 13,373,603,768.03/130,721.12
  6. Step 6: Final answer
    x = 102,306.37

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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.