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Finding the Fourth Proportional to 103,963.28, 143,453.40 and 58,639.28

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Solution

The fourth proportional to 103,963.28, 143,453.40 and 58,639.28 is: 80,913.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,963.28 : 143,453.40 = 58,639.28 : x
  2. Step 2: Convert to fraction form
    103,963.28/143,453.40 = 58,639.28/x
  3. Step 3: Cross multiply
    103,963.28x = 143,453.40 × 58,639.28
  4. Step 4: Simplify right side
    103,963.28x = 8,412,003,372.29
  5. Step 5: Solve for x
    x = 8,412,003,372.29/103,963.28
  6. Step 6: Final answer
    x = 80,913.22

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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.