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Finding the Fourth Proportional to 81,799.60, 122,699.40 and 72,468.40

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Solution

The fourth proportional to 81,799.60, 122,699.40 and 72,468.40 is: 108,702.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,799.60 : 122,699.40 = 72,468.40 : x
  2. Step 2: Convert to fraction form
    81,799.60/122,699.40 = 72,468.40/x
  3. Step 3: Cross multiply
    81,799.60x = 122,699.40 × 72,468.40
  4. Step 4: Simplify right side
    81,799.60x = 8,891,829,198.96
  5. Step 5: Solve for x
    x = 8,891,829,198.96/81,799.60
  6. Step 6: Final answer
    x = 108,702.60

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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.