Home / 212,288.66-318,422.57-79,158.50

Finding the Fourth Proportional to 212,288.66, 318,422.57 and 79,158.50

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Solution

The fourth proportional to 212,288.66, 318,422.57 and 79,158.50 is: 118,733.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,288.66 : 318,422.57 = 79,158.50 : x
  2. Step 2: Convert to fraction form
    212,288.66/318,422.57 = 79,158.50/x
  3. Step 3: Cross multiply
    212,288.66x = 318,422.57 × 79,158.50
  4. Step 4: Simplify right side
    212,288.66x = 25,205,853,407.61
  5. Step 5: Solve for x
    x = 25,205,853,407.61/212,288.66
  6. Step 6: Final answer
    x = 118,733.87

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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.