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Finding the Fourth Proportional to 212,151.84, 318,201.84 and 87,476.64

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Solution

The fourth proportional to 212,151.84, 318,201.84 and 87,476.64 is: 131,204.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,151.84 : 318,201.84 = 87,476.64 : x
  2. Step 2: Convert to fraction form
    212,151.84/318,201.84 = 87,476.64/x
  3. Step 3: Cross multiply
    212,151.84x = 318,201.84 × 87,476.64
  4. Step 4: Simplify right side
    212,151.84x = 27,835,227,805.02
  5. Step 5: Solve for x
    x = 27,835,227,805.02/212,151.84
  6. Step 6: Final answer
    x = 131,204.27

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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.