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Finding the Fourth Proportional to 72,082.08, 108,128.58 and 19,490.79

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Solution

The fourth proportional to 72,082.08, 108,128.58 and 19,490.79 is: 29,237.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,082.08 : 108,128.58 = 19,490.79 : x
  2. Step 2: Convert to fraction form
    72,082.08/108,128.58 = 19,490.79/x
  3. Step 3: Cross multiply
    72,082.08x = 108,128.58 × 19,490.79
  4. Step 4: Simplify right side
    72,082.08x = 2,107,511,445.78
  5. Step 5: Solve for x
    x = 2,107,511,445.78/72,082.08
  6. Step 6: Final answer
    x = 29,237.66

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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.