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Finding the Fourth Proportional to 72,889.24, 100,590.21 and 40,623.87

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Solution

The fourth proportional to 72,889.24, 100,590.21 and 40,623.87 is: 56,062.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,889.24 : 100,590.21 = 40,623.87 : x
  2. Step 2: Convert to fraction form
    72,889.24/100,590.21 = 40,623.87/x
  3. Step 3: Cross multiply
    72,889.24x = 100,590.21 × 40,623.87
  4. Step 4: Simplify right side
    72,889.24x = 4,086,363,614.31
  5. Step 5: Solve for x
    x = 4,086,363,614.31/72,889.24
  6. Step 6: Final answer
    x = 56,062.65

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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.