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Finding the Fourth Proportional to 72,979.69, 100,711.99 and 41,148.60

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Solution

The fourth proportional to 72,979.69, 100,711.99 and 41,148.60 is: 56,785.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,979.69 : 100,711.99 = 41,148.60 : x
  2. Step 2: Convert to fraction form
    72,979.69/100,711.99 = 41,148.60/x
  3. Step 3: Cross multiply
    72,979.69x = 100,711.99 × 41,148.60
  4. Step 4: Simplify right side
    72,979.69x = 4,144,157,391.71
  5. Step 5: Solve for x
    x = 4,144,157,391.71/72,979.69
  6. Step 6: Final answer
    x = 56,785.08

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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.