Home / 212,583.97-318,915.20-87,934.69

Finding the Fourth Proportional to 212,583.97, 318,915.20 and 87,934.69

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Solution

The fourth proportional to 212,583.97, 318,915.20 and 87,934.69 is: 131,918.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,583.97 : 318,915.20 = 87,934.69 : x
  2. Step 2: Convert to fraction form
    212,583.97/318,915.20 = 87,934.69/x
  3. Step 3: Cross multiply
    212,583.97x = 318,915.20 × 87,934.69
  4. Step 4: Simplify right side
    212,583.97x = 28,043,708,808.61
  5. Step 5: Solve for x
    x = 28,043,708,808.61/212,583.97
  6. Step 6: Final answer
    x = 131,918.27

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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.