Home / 212,074.10-318,027.47-85,690.51

Finding the Fourth Proportional to 212,074.10, 318,027.47 and 85,690.51

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Solution

The fourth proportional to 212,074.10, 318,027.47 and 85,690.51 is: 128,501.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,074.10 : 318,027.47 = 85,690.51 : x
  2. Step 2: Convert to fraction form
    212,074.10/318,027.47 = 85,690.51/x
  3. Step 3: Cross multiply
    212,074.10x = 318,027.47 × 85,690.51
  4. Step 4: Simplify right side
    212,074.10x = 27,251,934,874.79
  5. Step 5: Solve for x
    x = 27,251,934,874.79/212,074.10
  6. Step 6: Final answer
    x = 128,501.95

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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.