Home / 212,214.26-318,342.18-77,315

Finding the Fourth Proportional to 212,214.26, 318,342.18 and 77,315

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Solution

The fourth proportional to 212,214.26, 318,342.18 and 77,315 is: 115,980.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,214.26 : 318,342.18 = 77,315 : x
  2. Step 2: Convert to fraction form
    212,214.26/318,342.18 = 77,315/x
  3. Step 3: Cross multiply
    212,214.26x = 318,342.18 × 77,315
  4. Step 4: Simplify right side
    212,214.26x = 24,612,625,646.70
  5. Step 5: Solve for x
    x = 24,612,625,646.70/212,214.26
  6. Step 6: Final answer
    x = 115,980.07

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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.