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Finding the Fourth Proportional to 79,316.78, 118,816.54 and 47,709.38

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Solution

The fourth proportional to 79,316.78, 118,816.54 and 47,709.38 is: 71,468.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,316.78 : 118,816.54 = 47,709.38 : x
  2. Step 2: Convert to fraction form
    79,316.78/118,816.54 = 47,709.38/x
  3. Step 3: Cross multiply
    79,316.78x = 118,816.54 × 47,709.38
  4. Step 4: Simplify right side
    79,316.78x = 5,668,663,457.15
  5. Step 5: Solve for x
    x = 5,668,663,457.15/79,316.78
  6. Step 6: Final answer
    x = 71,468.65

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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.