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Finding the Fourth Proportional to 72,029.99, 99,401.76 and 39,764.05

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Solution

The fourth proportional to 72,029.99, 99,401.76 and 39,764.05 is: 54,874.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,029.99 : 99,401.76 = 39,764.05 : x
  2. Step 2: Convert to fraction form
    72,029.99/99,401.76 = 39,764.05/x
  3. Step 3: Cross multiply
    72,029.99x = 99,401.76 × 39,764.05
  4. Step 4: Simplify right side
    72,029.99x = 3,952,616,306.22
  5. Step 5: Solve for x
    x = 3,952,616,306.22/72,029.99
  6. Step 6: Final answer
    x = 54,874.59

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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.