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Finding the Fourth Proportional to 78,671.80, 108,705.18 and 62,886.52

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Solution

The fourth proportional to 78,671.80, 108,705.18 and 62,886.52 is: 86,893.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,671.80 : 108,705.18 = 62,886.52 : x
  2. Step 2: Convert to fraction form
    78,671.80/108,705.18 = 62,886.52/x
  3. Step 3: Cross multiply
    78,671.80x = 108,705.18 × 62,886.52
  4. Step 4: Simplify right side
    78,671.80x = 6,836,090,476.17
  5. Step 5: Solve for x
    x = 6,836,090,476.17/78,671.80
  6. Step 6: Final answer
    x = 86,893.79

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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.