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Finding the Fourth Proportional to 212,372.16, 318,410.61 and 93,978.91

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Solution

The fourth proportional to 212,372.16, 318,410.61 and 93,978.91 is: 140,903.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,372.16 : 318,410.61 = 93,978.91 : x
  2. Step 2: Convert to fraction form
    212,372.16/318,410.61 = 93,978.91/x
  3. Step 3: Cross multiply
    212,372.16x = 318,410.61 × 93,978.91
  4. Step 4: Simplify right side
    212,372.16x = 29,923,882,060.24
  5. Step 5: Solve for x
    x = 29,923,882,060.24/212,372.16
  6. Step 6: Final answer
    x = 140,903.04

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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.