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Finding the Fourth Proportional to 49,987.20, 74,989.20 and 14,930.40

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Solution

The fourth proportional to 49,987.20, 74,989.20 and 14,930.40 is: 22,398.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,987.20 : 74,989.20 = 14,930.40 : x
  2. Step 2: Convert to fraction form
    49,987.20/74,989.20 = 14,930.40/x
  3. Step 3: Cross multiply
    49,987.20x = 74,989.20 × 14,930.40
  4. Step 4: Simplify right side
    49,987.20x = 1,119,618,751.68
  5. Step 5: Solve for x
    x = 1,119,618,751.68/49,987.20
  6. Step 6: Final answer
    x = 22,398.11

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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.