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Finding the Fourth Proportional to 72,757.79, 100,404.71 and 40,926.68

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Solution

The fourth proportional to 72,757.79, 100,404.71 and 40,926.68 is: 56,478.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,757.79 : 100,404.71 = 40,926.68 : x
  2. Step 2: Convert to fraction form
    72,757.79/100,404.71 = 40,926.68/x
  3. Step 3: Cross multiply
    72,757.79x = 100,404.71 × 40,926.68
  4. Step 4: Simplify right side
    72,757.79x = 4,109,230,934.64
  5. Step 5: Solve for x
    x = 4,109,230,934.64/72,757.79
  6. Step 6: Final answer
    x = 56,478.23

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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.