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Finding the Fourth Proportional to 259,851.80, 389,778.65 and 79,935.98

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Solution

The fourth proportional to 259,851.80, 389,778.65 and 79,935.98 is: 119,904.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,851.80 : 389,778.65 = 79,935.98 : x
  2. Step 2: Convert to fraction form
    259,851.80/389,778.65 = 79,935.98/x
  3. Step 3: Cross multiply
    259,851.80x = 389,778.65 × 79,935.98
  4. Step 4: Simplify right side
    259,851.80x = 31,157,336,421.93
  5. Step 5: Solve for x
    x = 31,157,336,421.93/259,851.80
  6. Step 6: Final answer
    x = 119,904.26

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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.