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Finding the Fourth Proportional to 78,671.30, 108,704.49 and 62,886.02

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Solution

The fourth proportional to 78,671.30, 108,704.49 and 62,886.02 is: 86,893.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,671.30 : 108,704.49 = 62,886.02 : x
  2. Step 2: Convert to fraction form
    78,671.30/108,704.49 = 62,886.02/x
  3. Step 3: Cross multiply
    78,671.30x = 108,704.49 × 62,886.02
  4. Step 4: Simplify right side
    78,671.30x = 6,835,992,732.23
  5. Step 5: Solve for x
    x = 6,835,992,732.23/78,671.30
  6. Step 6: Final answer
    x = 86,893.09

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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.