Home / 78,426.96-117,558.21-38,390.75

Finding the Fourth Proportional to 78,426.96, 117,558.21 and 38,390.75

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Solution

The fourth proportional to 78,426.96, 117,558.21 and 38,390.75 is: 57,545.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,426.96 : 117,558.21 = 38,390.75 : x
  2. Step 2: Convert to fraction form
    78,426.96/117,558.21 = 38,390.75/x
  3. Step 3: Cross multiply
    78,426.96x = 117,558.21 × 38,390.75
  4. Step 4: Simplify right side
    78,426.96x = 4,513,147,262.77
  5. Step 5: Solve for x
    x = 4,513,147,262.77/78,426.96
  6. Step 6: Final answer
    x = 57,545.87

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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.