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Finding the Fourth Proportional to 78,781.72, 108,714.43 and 44,785.49

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Solution

The fourth proportional to 78,781.72, 108,714.43 and 44,785.49 is: 61,801.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,781.72 : 108,714.43 = 44,785.49 : x
  2. Step 2: Convert to fraction form
    78,781.72/108,714.43 = 44,785.49/x
  3. Step 3: Cross multiply
    78,781.72x = 108,714.43 × 44,785.49
  4. Step 4: Simplify right side
    78,781.72x = 4,868,828,250.12
  5. Step 5: Solve for x
    x = 4,868,828,250.12/78,781.72
  6. Step 6: Final answer
    x = 61,801.50

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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.