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Finding the Fourth Proportional to 72,934.89, 100,650.21 and 39,400.89

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Solution

The fourth proportional to 72,934.89, 100,650.21 and 39,400.89 is: 54,373.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,934.89 : 100,650.21 = 39,400.89 : x
  2. Step 2: Convert to fraction form
    72,934.89/100,650.21 = 39,400.89/x
  3. Step 3: Cross multiply
    72,934.89x = 100,650.21 × 39,400.89
  4. Step 4: Simplify right side
    72,934.89x = 3,965,707,852.69
  5. Step 5: Solve for x
    x = 3,965,707,852.69/72,934.89
  6. Step 6: Final answer
    x = 54,373.26

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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.