Home / 103,781.78-143,222.37-61,376.66

Finding the Fourth Proportional to 103,781.78, 143,222.37 and 61,376.66

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Solution

The fourth proportional to 103,781.78, 143,222.37 and 61,376.66 is: 84,701.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,781.78 : 143,222.37 = 61,376.66 : x
  2. Step 2: Convert to fraction form
    103,781.78/143,222.37 = 61,376.66/x
  3. Step 3: Cross multiply
    103,781.78x = 143,222.37 × 61,376.66
  4. Step 4: Simplify right side
    103,781.78x = 8,790,510,707.88
  5. Step 5: Solve for x
    x = 8,790,510,707.88/103,781.78
  6. Step 6: Final answer
    x = 84,701.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.