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Finding the Fourth Proportional to 212,613.70, 318,920.55 and 123,967.30

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Solution

The fourth proportional to 212,613.70, 318,920.55 and 123,967.30 is: 185,950.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,613.70 : 318,920.55 = 123,967.30 : x
  2. Step 2: Convert to fraction form
    212,613.70/318,920.55 = 123,967.30/x
  3. Step 3: Cross multiply
    212,613.70x = 318,920.55 × 123,967.30
  4. Step 4: Simplify right side
    212,613.70x = 39,535,719,498.02
  5. Step 5: Solve for x
    x = 39,535,719,498.02/212,613.70
  6. Step 6: Final answer
    x = 185,950.95

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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.