Home / 81,144.74-121,817.34-38,490.95

Finding the Fourth Proportional to 81,144.74, 121,817.34 and 38,490.95

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Solution

The fourth proportional to 81,144.74, 121,817.34 and 38,490.95 is: 57,783.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,144.74 : 121,817.34 = 38,490.95 : x
  2. Step 2: Convert to fraction form
    81,144.74/121,817.34 = 38,490.95/x
  3. Step 3: Cross multiply
    81,144.74x = 121,817.34 × 38,490.95
  4. Step 4: Simplify right side
    81,144.74x = 4,688,864,533.99
  5. Step 5: Solve for x
    x = 4,688,864,533.99/81,144.74
  6. Step 6: Final answer
    x = 57,783.97

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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.