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Finding the Fourth Proportional to 50,478.80, 75,721.80 and 15,418.40

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Solution

The fourth proportional to 50,478.80, 75,721.80 and 15,418.40 is: 23,128.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,478.80 : 75,721.80 = 15,418.40 : x
  2. Step 2: Convert to fraction form
    50,478.80/75,721.80 = 15,418.40/x
  3. Step 3: Cross multiply
    50,478.80x = 75,721.80 × 15,418.40
  4. Step 4: Simplify right side
    50,478.80x = 1,167,509,001.12
  5. Step 5: Solve for x
    x = 1,167,509,001.12/50,478.80
  6. Step 6: Final answer
    x = 23,128.70

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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.