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Finding the Fourth Proportional to 212,383.84, 318,621.84 and 64,636

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Solution

The fourth proportional to 212,383.84, 318,621.84 and 64,636 is: 96,968.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,383.84 : 318,621.84 = 64,636 : x
  2. Step 2: Convert to fraction form
    212,383.84/318,621.84 = 64,636/x
  3. Step 3: Cross multiply
    212,383.84x = 318,621.84 × 64,636
  4. Step 4: Simplify right side
    212,383.84x = 20,594,441,250.24
  5. Step 5: Solve for x
    x = 20,594,441,250.24/212,383.84
  6. Step 6: Final answer
    x = 96,968.02

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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.