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Finding the Fourth Proportional to 81,381.60, 112,305.60 and 49,550.40

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Solution

The fourth proportional to 81,381.60, 112,305.60 and 49,550.40 is: 68,378.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,381.60 : 112,305.60 = 49,550.40 : x
  2. Step 2: Convert to fraction form
    81,381.60/112,305.60 = 49,550.40/x
  3. Step 3: Cross multiply
    81,381.60x = 112,305.60 × 49,550.40
  4. Step 4: Simplify right side
    81,381.60x = 5,564,787,402.24
  5. Step 5: Solve for x
    x = 5,564,787,402.24/81,381.60
  6. Step 6: Final answer
    x = 68,378.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.