Home / 77,769.28-116,640.16-21,613.36

Finding the Fourth Proportional to 77,769.28, 116,640.16 and 21,613.36

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Solution

The fourth proportional to 77,769.28, 116,640.16 and 21,613.36 is: 32,416.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,769.28 : 116,640.16 = 21,613.36 : x
  2. Step 2: Convert to fraction form
    77,769.28/116,640.16 = 21,613.36/x
  3. Step 3: Cross multiply
    77,769.28x = 116,640.16 × 21,613.36
  4. Step 4: Simplify right side
    77,769.28x = 2,520,985,768.54
  5. Step 5: Solve for x
    x = 2,520,985,768.54/77,769.28
  6. Step 6: Final answer
    x = 32,416.22

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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.