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Finding the Fourth Proportional to 72,245.79, 99,725.94 and 54,392.58

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Solution

The fourth proportional to 72,245.79, 99,725.94 and 54,392.58 is: 75,081.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,245.79 : 99,725.94 = 54,392.58 : x
  2. Step 2: Convert to fraction form
    72,245.79/99,725.94 = 54,392.58/x
  3. Step 3: Cross multiply
    72,245.79x = 99,725.94 × 54,392.58
  4. Step 4: Simplify right side
    72,245.79x = 5,424,351,169.53
  5. Step 5: Solve for x
    x = 5,424,351,169.53/72,245.79
  6. Step 6: Final answer
    x = 75,081.90

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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.