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Finding the Fourth Proportional to 81,085.70, 121,570.95 and 36,733.70

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Solution

The fourth proportional to 81,085.70, 121,570.95 and 36,733.70 is: 55,074.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,085.70 : 121,570.95 = 36,733.70 : x
  2. Step 2: Convert to fraction form
    81,085.70/121,570.95 = 36,733.70/x
  3. Step 3: Cross multiply
    81,085.70x = 121,570.95 × 36,733.70
  4. Step 4: Simplify right side
    81,085.70x = 4,465,750,806.02
  5. Step 5: Solve for x
    x = 4,465,750,806.02/81,085.70
  6. Step 6: Final answer
    x = 55,074.46

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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.