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Finding the Fourth Proportional to 75,399, 104,042.76 and 43,578.18

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Solution

The fourth proportional to 75,399, 104,042.76 and 43,578.18 is: 60,133.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,399 : 104,042.76 = 43,578.18 : x
  2. Step 2: Convert to fraction form
    75,399/104,042.76 = 43,578.18/x
  3. Step 3: Cross multiply
    75,399x = 104,042.76 × 43,578.18
  4. Step 4: Simplify right side
    75,399x = 4,533,994,122.98
  5. Step 5: Solve for x
    x = 4,533,994,122.98/75,399
  6. Step 6: Final answer
    x = 60,133.35

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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.