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Finding the Fourth Proportional to 103,665.77, 143,102.91 and 69,693.97

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Solution

The fourth proportional to 103,665.77, 143,102.91 and 69,693.97 is: 96,207.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,665.77 : 143,102.91 = 69,693.97 : x
  2. Step 2: Convert to fraction form
    103,665.77/143,102.91 = 69,693.97/x
  3. Step 3: Cross multiply
    103,665.77x = 143,102.91 × 69,693.97
  4. Step 4: Simplify right side
    103,665.77x = 9,973,409,916.45
  5. Step 5: Solve for x
    x = 9,973,409,916.45/103,665.77
  6. Step 6: Final answer
    x = 96,207.36

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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.