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Finding the Fourth Proportional to 212,626.98, 318,998.04 and 79,520.76

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Solution

The fourth proportional to 212,626.98, 318,998.04 and 79,520.76 is: 119,302.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,626.98 : 318,998.04 = 79,520.76 : x
  2. Step 2: Convert to fraction form
    212,626.98/318,998.04 = 79,520.76/x
  3. Step 3: Cross multiply
    212,626.98x = 318,998.04 × 79,520.76
  4. Step 4: Simplify right side
    212,626.98x = 25,366,966,579.31
  5. Step 5: Solve for x
    x = 25,366,966,579.31/212,626.98
  6. Step 6: Final answer
    x = 119,302.67

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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.