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Finding the Fourth Proportional to 216,570.72, 298,869.72 and 121,082.64

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Solution

The fourth proportional to 216,570.72, 298,869.72 and 121,082.64 is: 167,095.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,570.72 : 298,869.72 = 121,082.64 : x
  2. Step 2: Convert to fraction form
    216,570.72/298,869.72 = 121,082.64/x
  3. Step 3: Cross multiply
    216,570.72x = 298,869.72 × 121,082.64
  4. Step 4: Simplify right side
    216,570.72x = 36,187,934,713.66
  5. Step 5: Solve for x
    x = 36,187,934,713.66/216,570.72
  6. Step 6: Final answer
    x = 167,095.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.