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Finding the Fourth Proportional to 72,945.15, 100,693.30 and 62,695.61

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Solution

The fourth proportional to 72,945.15, 100,693.30 and 62,695.61 is: 86,544.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,945.15 : 100,693.30 = 62,695.61 : x
  2. Step 2: Convert to fraction form
    72,945.15/100,693.30 = 62,695.61/x
  3. Step 3: Cross multiply
    72,945.15x = 100,693.30 × 62,695.61
  4. Step 4: Simplify right side
    72,945.15x = 6,313,027,866.41
  5. Step 5: Solve for x
    x = 6,313,027,866.41/72,945.15
  6. Step 6: Final answer
    x = 86,544.86

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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.