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Finding the Fourth Proportional to 81,165.40, 121,529.40 and 63,669.40

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Solution

The fourth proportional to 81,165.40, 121,529.40 and 63,669.40 is: 95,332.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,165.40 : 121,529.40 = 63,669.40 : x
  2. Step 2: Convert to fraction form
    81,165.40/121,529.40 = 63,669.40/x
  3. Step 3: Cross multiply
    81,165.40x = 121,529.40 × 63,669.40
  4. Step 4: Simplify right side
    81,165.40x = 7,737,703,980.36
  5. Step 5: Solve for x
    x = 7,737,703,980.36/81,165.40
  6. Step 6: Final answer
    x = 95,332.54

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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.