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Finding the Fourth Proportional to 79,884.23, 109,900.60 and 77,669.89

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Solution

The fourth proportional to 79,884.23, 109,900.60 and 77,669.89 is: 106,854.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,884.23 : 109,900.60 = 77,669.89 : x
  2. Step 2: Convert to fraction form
    79,884.23/109,900.60 = 77,669.89/x
  3. Step 3: Cross multiply
    79,884.23x = 109,900.60 × 77,669.89
  4. Step 4: Simplify right side
    79,884.23x = 8,535,967,044.01
  5. Step 5: Solve for x
    x = 8,535,967,044.01/79,884.23
  6. Step 6: Final answer
    x = 106,854.23

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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.