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Finding the Fourth Proportional to 216,082.60, 324,123.90 and 121,215.40

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Solution

The fourth proportional to 216,082.60, 324,123.90 and 121,215.40 is: 181,823.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,082.60 : 324,123.90 = 121,215.40 : x
  2. Step 2: Convert to fraction form
    216,082.60/324,123.90 = 121,215.40/x
  3. Step 3: Cross multiply
    216,082.60x = 324,123.90 × 121,215.40
  4. Step 4: Simplify right side
    216,082.60x = 39,288,808,188.06
  5. Step 5: Solve for x
    x = 39,288,808,188.06/216,082.60
  6. Step 6: Final answer
    x = 181,823.10

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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.