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Finding the Fourth Proportional to 81,200.90, 121,801.35 and 22,043.90

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Solution

The fourth proportional to 81,200.90, 121,801.35 and 22,043.90 is: 33,065.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,200.90 : 121,801.35 = 22,043.90 : x
  2. Step 2: Convert to fraction form
    81,200.90/121,801.35 = 22,043.90/x
  3. Step 3: Cross multiply
    81,200.90x = 121,801.35 × 22,043.90
  4. Step 4: Simplify right side
    81,200.90x = 2,684,976,779.27
  5. Step 5: Solve for x
    x = 2,684,976,779.27/81,200.90
  6. Step 6: Final answer
    x = 33,065.85

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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.