Home / 212,422.18-318,633.22-79,312.82

Finding the Fourth Proportional to 212,422.18, 318,633.22 and 79,312.82

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Solution

The fourth proportional to 212,422.18, 318,633.22 and 79,312.82 is: 118,969.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,422.18 : 318,633.22 = 79,312.82 : x
  2. Step 2: Convert to fraction form
    212,422.18/318,633.22 = 79,312.82/x
  3. Step 3: Cross multiply
    212,422.18x = 318,633.22 × 79,312.82
  4. Step 4: Simplify right side
    212,422.18x = 25,271,699,299.10
  5. Step 5: Solve for x
    x = 25,271,699,299.10/212,422.18
  6. Step 6: Final answer
    x = 118,969.21

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1.5x scale

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.