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Finding the Fourth Proportional to 78,562.73, 117,799.62 and 71,867.77

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Solution

The fourth proportional to 78,562.73, 117,799.62 and 71,867.77 is: 107,760.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,562.73 : 117,799.62 = 71,867.77 : x
  2. Step 2: Convert to fraction form
    78,562.73/117,799.62 = 71,867.77/x
  3. Step 3: Cross multiply
    78,562.73x = 117,799.62 × 71,867.77
  4. Step 4: Simplify right side
    78,562.73x = 8,465,996,701.25
  5. Step 5: Solve for x
    x = 8,465,996,701.25/78,562.73
  6. Step 6: Final answer
    x = 107,760.98

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1.5x scale

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.