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Finding the Fourth Proportional to 72,775.65, 100,418.70 and 40,504.65

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Solution

The fourth proportional to 72,775.65, 100,418.70 and 40,504.65 is: 55,889.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,775.65 : 100,418.70 = 40,504.65 : x
  2. Step 2: Convert to fraction form
    72,775.65/100,418.70 = 40,504.65/x
  3. Step 3: Cross multiply
    72,775.65x = 100,418.70 × 40,504.65
  4. Step 4: Simplify right side
    72,775.65x = 4,067,424,296.96
  5. Step 5: Solve for x
    x = 4,067,424,296.96/72,775.65
  6. Step 6: Final answer
    x = 55,889.91

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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.