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Finding the Fourth Proportional to 141,875.78, 195,789.89 and 78,215.86

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Solution

The fourth proportional to 141,875.78, 195,789.89 and 78,215.86 is: 107,938.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,875.78 : 195,789.89 = 78,215.86 : x
  2. Step 2: Convert to fraction form
    141,875.78/195,789.89 = 78,215.86/x
  3. Step 3: Cross multiply
    141,875.78x = 195,789.89 × 78,215.86
  4. Step 4: Simplify right side
    141,875.78x = 15,313,874,625.66
  5. Step 5: Solve for x
    x = 15,313,874,625.66/141,875.78
  6. Step 6: Final answer
    x = 107,938.61

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1.5x scale

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.