Home / 90,529.30-124,487.31-78,571.81

Finding the Fourth Proportional to 90,529.30, 124,487.31 and 78,571.81

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Solution

The fourth proportional to 90,529.30, 124,487.31 and 78,571.81 is: 108,044.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,529.30 : 124,487.31 = 78,571.81 : x
  2. Step 2: Convert to fraction form
    90,529.30/124,487.31 = 78,571.81/x
  3. Step 3: Cross multiply
    90,529.30x = 124,487.31 × 78,571.81
  4. Step 4: Simplify right side
    90,529.30x = 9,781,193,268.73
  5. Step 5: Solve for x
    x = 9,781,193,268.73/90,529.30
  6. Step 6: Final answer
    x = 108,044.50

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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.