Home / 212,141.75-318,002.43-99,620.55

Finding the Fourth Proportional to 212,141.75, 318,002.43 and 99,620.55

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Solution

The fourth proportional to 212,141.75, 318,002.43 and 99,620.55 is: 149,332.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,141.75 : 318,002.43 = 99,620.55 : x
  2. Step 2: Convert to fraction form
    212,141.75/318,002.43 = 99,620.55/x
  3. Step 3: Cross multiply
    212,141.75x = 318,002.43 × 99,620.55
  4. Step 4: Simplify right side
    212,141.75x = 31,679,576,977.94
  5. Step 5: Solve for x
    x = 31,679,576,977.94/212,141.75
  6. Step 6: Final answer
    x = 149,332.12

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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.