Home / 72,218.08-99,658.05-39,950.65

Finding the Fourth Proportional to 72,218.08, 99,658.05 and 39,950.65

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Solution

The fourth proportional to 72,218.08, 99,658.05 and 39,950.65 is: 55,130.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,218.08 : 99,658.05 = 39,950.65 : x
  2. Step 2: Convert to fraction form
    72,218.08/99,658.05 = 39,950.65/x
  3. Step 3: Cross multiply
    72,218.08x = 99,658.05 × 39,950.65
  4. Step 4: Simplify right side
    72,218.08x = 3,981,403,849.99
  5. Step 5: Solve for x
    x = 3,981,403,849.99/72,218.08
  6. Step 6: Final answer
    x = 55,130.29

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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.