Home / 120,721.60-180,736.80-74,065.60

Finding the Fourth Proportional to 120,721.60, 180,736.80 and 74,065.60

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Solution

The fourth proportional to 120,721.60, 180,736.80 and 74,065.60 is: 110,886.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,721.60 : 180,736.80 = 74,065.60 : x
  2. Step 2: Convert to fraction form
    120,721.60/180,736.80 = 74,065.60/x
  3. Step 3: Cross multiply
    120,721.60x = 180,736.80 × 74,065.60
  4. Step 4: Simplify right side
    120,721.60x = 13,386,379,534.08
  5. Step 5: Solve for x
    x = 13,386,379,534.08/120,721.60
  6. Step 6: Final answer
    x = 110,886.37

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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.