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Finding the Fourth Proportional to 218,867.84, 328,243.32 and 61,068.56

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Solution

The fourth proportional to 218,867.84, 328,243.32 and 61,068.56 is: 91,586.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,867.84 : 328,243.32 = 61,068.56 : x
  2. Step 2: Convert to fraction form
    218,867.84/328,243.32 = 61,068.56/x
  3. Step 3: Cross multiply
    218,867.84x = 328,243.32 × 61,068.56
  4. Step 4: Simplify right side
    218,867.84x = 20,045,346,882.02
  5. Step 5: Solve for x
    x = 20,045,346,882.02/218,867.84
  6. Step 6: Final answer
    x = 91,586.53

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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.