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Finding the Fourth Proportional to 71,984.93, 107,979.92 and 19,395.68

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Solution

The fourth proportional to 71,984.93, 107,979.92 and 19,395.68 is: 29,094.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,984.93 : 107,979.92 = 19,395.68 : x
  2. Step 2: Convert to fraction form
    71,984.93/107,979.92 = 19,395.68/x
  3. Step 3: Cross multiply
    71,984.93x = 107,979.92 × 19,395.68
  4. Step 4: Simplify right side
    71,984.93x = 2,094,343,337.87
  5. Step 5: Solve for x
    x = 2,094,343,337.87/71,984.93
  6. Step 6: Final answer
    x = 29,094.19

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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.