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Finding the Fourth Proportional to 61,138.80, 84,389.04 and 36,002.88

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Solution

The fourth proportional to 61,138.80, 84,389.04 and 36,002.88 is: 49,694.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,138.80 : 84,389.04 = 36,002.88 : x
  2. Step 2: Convert to fraction form
    61,138.80/84,389.04 = 36,002.88/x
  3. Step 3: Cross multiply
    61,138.80x = 84,389.04 × 36,002.88
  4. Step 4: Simplify right side
    61,138.80x = 3,038,248,480.44
  5. Step 5: Solve for x
    x = 3,038,248,480.44/61,138.80
  6. Step 6: Final answer
    x = 49,694.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.