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Finding the Fourth Proportional to 72,494.64, 108,621.90 and 51,330.18

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Solution

The fourth proportional to 72,494.64, 108,621.90 and 51,330.18 is: 76,910.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,494.64 : 108,621.90 = 51,330.18 : x
  2. Step 2: Convert to fraction form
    72,494.64/108,621.90 = 51,330.18/x
  3. Step 3: Cross multiply
    72,494.64x = 108,621.90 × 51,330.18
  4. Step 4: Simplify right side
    72,494.64x = 5,575,581,678.94
  5. Step 5: Solve for x
    x = 5,575,581,678.94/72,494.64
  6. Step 6: Final answer
    x = 76,910.26

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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.