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Finding the Fourth Proportional to 212,306.91, 318,477.65 and 60,515.60

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Solution

The fourth proportional to 212,306.91, 318,477.65 and 60,515.60 is: 90,778.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,306.91 : 318,477.65 = 60,515.60 : x
  2. Step 2: Convert to fraction form
    212,306.91/318,477.65 = 60,515.60/x
  3. Step 3: Cross multiply
    212,306.91x = 318,477.65 × 60,515.60
  4. Step 4: Simplify right side
    212,306.91x = 19,272,864,181.37
  5. Step 5: Solve for x
    x = 19,272,864,181.37/212,306.91
  6. Step 6: Final answer
    x = 90,778.32

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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.