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Finding the Fourth Proportional to 103,960.82, 143,465.72 and 58,638.66

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Solution

The fourth proportional to 103,960.82, 143,465.72 and 58,638.66 is: 80,921.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,960.82 : 143,465.72 = 58,638.66 : x
  2. Step 2: Convert to fraction form
    103,960.82/143,465.72 = 58,638.66/x
  3. Step 3: Cross multiply
    103,960.82x = 143,465.72 × 58,638.66
  4. Step 4: Simplify right side
    103,960.82x = 8,412,637,576.74
  5. Step 5: Solve for x
    x = 8,412,637,576.74/103,960.82
  6. Step 6: Final answer
    x = 80,921.23

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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.