Home / 212,082.36-318,123.60-99,680.04

Finding the Fourth Proportional to 212,082.36, 318,123.60 and 99,680.04

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Solution

The fourth proportional to 212,082.36, 318,123.60 and 99,680.04 is: 149,520.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,082.36 : 318,123.60 = 99,680.04 : x
  2. Step 2: Convert to fraction form
    212,082.36/318,123.60 = 99,680.04/x
  3. Step 3: Cross multiply
    212,082.36x = 318,123.60 × 99,680.04
  4. Step 4: Simplify right side
    212,082.36x = 31,710,573,172.94
  5. Step 5: Solve for x
    x = 31,710,573,172.94/212,082.36
  6. Step 6: Final answer
    x = 149,520.09

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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.