Home / 78,813.18-108,778.37-48,191.50

Finding the Fourth Proportional to 78,813.18, 108,778.37 and 48,191.50

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Solution

The fourth proportional to 78,813.18, 108,778.37 and 48,191.50 is: 66,514.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,813.18 : 108,778.37 = 48,191.50 : x
  2. Step 2: Convert to fraction form
    78,813.18/108,778.37 = 48,191.50/x
  3. Step 3: Cross multiply
    78,813.18x = 108,778.37 × 48,191.50
  4. Step 4: Simplify right side
    78,813.18x = 5,242,192,817.86
  5. Step 5: Solve for x
    x = 5,242,192,817.86/78,813.18
  6. Step 6: Final answer
    x = 66,514.16

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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.