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Finding the Fourth Proportional to 72,934.86, 100,650.02 and 39,400.86

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Solution

The fourth proportional to 72,934.86, 100,650.02 and 39,400.86 is: 54,373.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,934.86 : 100,650.02 = 39,400.86 : x
  2. Step 2: Convert to fraction form
    72,934.86/100,650.02 = 39,400.86/x
  3. Step 3: Cross multiply
    72,934.86x = 100,650.02 × 39,400.86
  4. Step 4: Simplify right side
    72,934.86x = 3,965,697,347.02
  5. Step 5: Solve for x
    x = 3,965,697,347.02/72,934.86
  6. Step 6: Final answer
    x = 54,373.14

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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.