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Finding the Fourth Proportional to 212,380.34, 318,616.59 and 64,632.50

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Solution

The fourth proportional to 212,380.34, 318,616.59 and 64,632.50 is: 96,962.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,380.34 : 318,616.59 = 64,632.50 : x
  2. Step 2: Convert to fraction form
    212,380.34/318,616.59 = 64,632.50/x
  3. Step 3: Cross multiply
    212,380.34x = 318,616.59 × 64,632.50
  4. Step 4: Simplify right side
    212,380.34x = 20,592,986,753.18
  5. Step 5: Solve for x
    x = 20,592,986,753.18/212,380.34
  6. Step 6: Final answer
    x = 96,962.77

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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.