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Finding the Fourth Proportional to 72,757.45, 100,406.12 and 40,926.07

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Solution

The fourth proportional to 72,757.45, 100,406.12 and 40,926.07 is: 56,478.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,757.45 : 100,406.12 = 40,926.07 : x
  2. Step 2: Convert to fraction form
    72,757.45/100,406.12 = 40,926.07/x
  3. Step 3: Cross multiply
    72,757.45x = 100,406.12 × 40,926.07
  4. Step 4: Simplify right side
    72,757.45x = 4,109,227,895.55
  5. Step 5: Solve for x
    x = 4,109,227,895.55/72,757.45
  6. Step 6: Final answer
    x = 56,478.45

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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.