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Finding the Fourth Proportional to 81,070.94, 121,605.98 and 27,763.40

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Solution

The fourth proportional to 81,070.94, 121,605.98 and 27,763.40 is: 41,644.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,070.94 : 121,605.98 = 27,763.40 : x
  2. Step 2: Convert to fraction form
    81,070.94/121,605.98 = 27,763.40/x
  3. Step 3: Cross multiply
    81,070.94x = 121,605.98 × 27,763.40
  4. Step 4: Simplify right side
    81,070.94x = 3,376,195,630.33
  5. Step 5: Solve for x
    x = 3,376,195,630.33/81,070.94
  6. Step 6: Final answer
    x = 41,644.95

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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.