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Finding the Fourth Proportional to 218,865.84, 328,240.32 and 61,066.56

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Solution

The fourth proportional to 218,865.84, 328,240.32 and 61,066.56 is: 91,583.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,865.84 : 328,240.32 = 61,066.56 : x
  2. Step 2: Convert to fraction form
    218,865.84/328,240.32 = 61,066.56/x
  3. Step 3: Cross multiply
    218,865.84x = 328,240.32 × 61,066.56
  4. Step 4: Simplify right side
    218,865.84x = 20,044,507,195.70
  5. Step 5: Solve for x
    x = 20,044,507,195.70/218,865.84
  6. Step 6: Final answer
    x = 91,583.53

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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.