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Finding the Fourth Proportional to 78,899.61, 118,351.85 and 34,503.51

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Solution

The fourth proportional to 78,899.61, 118,351.85 and 34,503.51 is: 51,756.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,899.61 : 118,351.85 = 34,503.51 : x
  2. Step 2: Convert to fraction form
    78,899.61/118,351.85 = 34,503.51/x
  3. Step 3: Cross multiply
    78,899.61x = 118,351.85 × 34,503.51
  4. Step 4: Simplify right side
    78,899.61x = 4,083,554,067.48
  5. Step 5: Solve for x
    x = 4,083,554,067.48/78,899.61
  6. Step 6: Final answer
    x = 51,756.33

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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.