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Finding the Fourth Proportional to 212,618.20, 318,927.30 and 64,874.20

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Solution

The fourth proportional to 212,618.20, 318,927.30 and 64,874.20 is: 97,311.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,618.20 : 318,927.30 = 64,874.20 : x
  2. Step 2: Convert to fraction form
    212,618.20/318,927.30 = 64,874.20/x
  3. Step 3: Cross multiply
    212,618.20x = 318,927.30 × 64,874.20
  4. Step 4: Simplify right side
    212,618.20x = 20,690,153,445.66
  5. Step 5: Solve for x
    x = 20,690,153,445.66/212,618.20
  6. Step 6: Final answer
    x = 97,311.30

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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.