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Finding the Fourth Proportional to 212,018.92, 318,027.57 and 75,342.76

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Solution

The fourth proportional to 212,018.92, 318,027.57 and 75,342.76 is: 113,013.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,018.92 : 318,027.57 = 75,342.76 : x
  2. Step 2: Convert to fraction form
    212,018.92/318,027.57 = 75,342.76/x
  3. Step 3: Cross multiply
    212,018.92x = 318,027.57 × 75,342.76
  4. Step 4: Simplify right side
    212,018.92x = 23,961,074,879.89
  5. Step 5: Solve for x
    x = 23,961,074,879.89/212,018.92
  6. Step 6: Final answer
    x = 113,013.85

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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.