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Finding the Fourth Proportional to 70,479.92, 105,736.08 and 40,922.48

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Solution

The fourth proportional to 70,479.92, 105,736.08 and 40,922.48 is: 61,393.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,479.92 : 105,736.08 = 40,922.48 : x
  2. Step 2: Convert to fraction form
    70,479.92/105,736.08 = 40,922.48/x
  3. Step 3: Cross multiply
    70,479.92x = 105,736.08 × 40,922.48
  4. Step 4: Simplify right side
    70,479.92x = 4,326,982,619.08
  5. Step 5: Solve for x
    x = 4,326,982,619.08/70,479.92
  6. Step 6: Final answer
    x = 61,393.13

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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.