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Finding the Fourth Proportional to 218,717, 328,075.71 and 60,949.66

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Solution

The fourth proportional to 218,717, 328,075.71 and 60,949.66 is: 91,424.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,717 : 328,075.71 = 60,949.66 : x
  2. Step 2: Convert to fraction form
    218,717/328,075.71 = 60,949.66/x
  3. Step 3: Cross multiply
    218,717x = 328,075.71 × 60,949.66
  4. Step 4: Simplify right side
    218,717x = 19,996,102,978.76
  5. Step 5: Solve for x
    x = 19,996,102,978.76/218,717
  6. Step 6: Final answer
    x = 91,424.55

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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.