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Finding the Fourth Proportional to 60,640.88, 90,948.36 and 19,078.64

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Solution

The fourth proportional to 60,640.88, 90,948.36 and 19,078.64 is: 28,613.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,640.88 : 90,948.36 = 19,078.64 : x
  2. Step 2: Convert to fraction form
    60,640.88/90,948.36 = 19,078.64/x
  3. Step 3: Cross multiply
    60,640.88x = 90,948.36 × 19,078.64
  4. Step 4: Simplify right side
    60,640.88x = 1,735,171,019.03
  5. Step 5: Solve for x
    x = 1,735,171,019.03/60,640.88
  6. Step 6: Final answer
    x = 28,613.88

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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.