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Finding the Fourth Proportional to 72,122.99, 99,530.02 and 39,418.06

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Solution

The fourth proportional to 72,122.99, 99,530.02 and 39,418.06 is: 54,397.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,122.99 : 99,530.02 = 39,418.06 : x
  2. Step 2: Convert to fraction form
    72,122.99/99,530.02 = 39,418.06/x
  3. Step 3: Cross multiply
    72,122.99x = 99,530.02 × 39,418.06
  4. Step 4: Simplify right side
    72,122.99x = 3,923,280,174.52
  5. Step 5: Solve for x
    x = 3,923,280,174.52/72,122.99
  6. Step 6: Final answer
    x = 54,397.09

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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.