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Finding the Fourth Proportional to 72,586.32, 108,843.48 and 42,607.68

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Solution

The fourth proportional to 72,586.32, 108,843.48 and 42,607.68 is: 63,890.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,586.32 : 108,843.48 = 42,607.68 : x
  2. Step 2: Convert to fraction form
    72,586.32/108,843.48 = 42,607.68/x
  3. Step 3: Cross multiply
    72,586.32x = 108,843.48 × 42,607.68
  4. Step 4: Simplify right side
    72,586.32x = 4,637,568,165.93
  5. Step 5: Solve for x
    x = 4,637,568,165.93/72,586.32
  6. Step 6: Final answer
    x = 63,890.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.