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Finding the Fourth Proportional to 141,990.86, 195,948.03 and 78,328.64

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Solution

The fourth proportional to 141,990.86, 195,948.03 and 78,328.64 is: 108,093.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,990.86 : 195,948.03 = 78,328.64 : x
  2. Step 2: Convert to fraction form
    141,990.86/195,948.03 = 78,328.64/x
  3. Step 3: Cross multiply
    141,990.86x = 195,948.03 × 78,328.64
  4. Step 4: Simplify right side
    141,990.86x = 15,348,341,720.84
  5. Step 5: Solve for x
    x = 15,348,341,720.84/141,990.86
  6. Step 6: Final answer
    x = 108,093.87

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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.