Home / 77,278.42-115,899.45-21,105.19

Finding the Fourth Proportional to 77,278.42, 115,899.45 and 21,105.19

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Solution

The fourth proportional to 77,278.42, 115,899.45 and 21,105.19 is: 31,652.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,278.42 : 115,899.45 = 21,105.19 : x
  2. Step 2: Convert to fraction form
    77,278.42/115,899.45 = 21,105.19/x
  3. Step 3: Cross multiply
    77,278.42x = 115,899.45 × 21,105.19
  4. Step 4: Simplify right side
    77,278.42x = 2,446,079,913.15
  5. Step 5: Solve for x
    x = 2,446,079,913.15/77,278.42
  6. Step 6: Final answer
    x = 31,652.82

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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.