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Finding the Fourth Proportional to 72,373.99, 99,876.08 and 39,668.21

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Solution

The fourth proportional to 72,373.99, 99,876.08 and 39,668.21 is: 54,742.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,373.99 : 99,876.08 = 39,668.21 : x
  2. Step 2: Convert to fraction form
    72,373.99/99,876.08 = 39,668.21/x
  3. Step 3: Cross multiply
    72,373.99x = 99,876.08 × 39,668.21
  4. Step 4: Simplify right side
    72,373.99x = 3,961,905,664.28
  5. Step 5: Solve for x
    x = 3,961,905,664.28/72,373.99
  6. Step 6: Final answer
    x = 54,742.12

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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.