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Finding the Fourth Proportional to 72,174.30, 99,595.99 and 39,908.09

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Solution

The fourth proportional to 72,174.30, 99,595.99 and 39,908.09 is: 55,070.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,174.30 : 99,595.99 = 39,908.09 : x
  2. Step 2: Convert to fraction form
    72,174.30/99,595.99 = 39,908.09/x
  3. Step 3: Cross multiply
    72,174.30x = 99,595.99 × 39,908.09
  4. Step 4: Simplify right side
    72,174.30x = 3,974,685,732.56
  5. Step 5: Solve for x
    x = 3,974,685,732.56/72,174.30
  6. Step 6: Final answer
    x = 55,070.65

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1.5x scale

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.