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Finding the Fourth Proportional to 81,081.80, 121,622.70 and 36,707.57

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Solution

The fourth proportional to 81,081.80, 121,622.70 and 36,707.57 is: 55,061.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,081.80 : 121,622.70 = 36,707.57 : x
  2. Step 2: Convert to fraction form
    81,081.80/121,622.70 = 36,707.57/x
  3. Step 3: Cross multiply
    81,081.80x = 121,622.70 × 36,707.57
  4. Step 4: Simplify right side
    81,081.80x = 4,464,473,590.30
  5. Step 5: Solve for x
    x = 4,464,473,590.30/81,081.80
  6. Step 6: Final answer
    x = 55,061.35

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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.