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Finding the Fourth Proportional to 79,108.65, 118,700.64 and 39,693.65

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Solution

The fourth proportional to 79,108.65, 118,700.64 and 39,693.65 is: 59,559.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,108.65 : 118,700.64 = 39,693.65 : x
  2. Step 2: Convert to fraction form
    79,108.65/118,700.64 = 39,693.65/x
  3. Step 3: Cross multiply
    79,108.65x = 118,700.64 × 39,693.65
  4. Step 4: Simplify right side
    79,108.65x = 4,711,661,065.43
  5. Step 5: Solve for x
    x = 4,711,661,065.43/79,108.65
  6. Step 6: Final answer
    x = 59,559.37

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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.