Home / 212,134.64-318,118.55-77,166.68

Finding the Fourth Proportional to 212,134.64, 318,118.55 and 77,166.68

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Solution

The fourth proportional to 212,134.64, 318,118.55 and 77,166.68 is: 115,719.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,134.64 : 318,118.55 = 77,166.68 : x
  2. Step 2: Convert to fraction form
    212,134.64/318,118.55 = 77,166.68/x
  3. Step 3: Cross multiply
    212,134.64x = 318,118.55 × 77,166.68
  4. Step 4: Simplify right side
    212,134.64x = 24,548,150,373.49
  5. Step 5: Solve for x
    x = 24,548,150,373.49/212,134.64
  6. Step 6: Final answer
    x = 115,719.67

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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.