Home / 91,809.28-137,679.36-72,317.44

Finding the Fourth Proportional to 91,809.28, 137,679.36 and 72,317.44

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Solution

The fourth proportional to 91,809.28, 137,679.36 and 72,317.44 is: 108,448.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,809.28 : 137,679.36 = 72,317.44 : x
  2. Step 2: Convert to fraction form
    91,809.28/137,679.36 = 72,317.44/x
  3. Step 3: Cross multiply
    91,809.28x = 137,679.36 × 72,317.44
  4. Step 4: Simplify right side
    91,809.28x = 9,956,618,856.04
  5. Step 5: Solve for x
    x = 9,956,618,856.04/91,809.28
  6. Step 6: Final answer
    x = 108,448.94

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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.