Home / 77,330.38-115,991.30-21,166.42

Finding the Fourth Proportional to 77,330.38, 115,991.30 and 21,166.42

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Solution

The fourth proportional to 77,330.38, 115,991.30 and 21,166.42 is: 31,748.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,330.38 : 115,991.30 = 21,166.42 : x
  2. Step 2: Convert to fraction form
    77,330.38/115,991.30 = 21,166.42/x
  3. Step 3: Cross multiply
    77,330.38x = 115,991.30 × 21,166.42
  4. Step 4: Simplify right side
    77,330.38x = 2,455,120,572.15
  5. Step 5: Solve for x
    x = 2,455,120,572.15/77,330.38
  6. Step 6: Final answer
    x = 31,748.46

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1.5x scale

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.