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Finding the Fourth Proportional to 185,640.40, 278,460.60 and 60,965.20

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Solution

The fourth proportional to 185,640.40, 278,460.60 and 60,965.20 is: 91,447.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,640.40 : 278,460.60 = 60,965.20 : x
  2. Step 2: Convert to fraction form
    185,640.40/278,460.60 = 60,965.20/x
  3. Step 3: Cross multiply
    185,640.40x = 278,460.60 × 60,965.20
  4. Step 4: Simplify right side
    185,640.40x = 16,976,406,171.12
  5. Step 5: Solve for x
    x = 16,976,406,171.12/185,640.40
  6. Step 6: Final answer
    x = 91,447.80

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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.