Home / 141,875.31-195,789.45-78,215.40

Finding the Fourth Proportional to 141,875.31, 195,789.45 and 78,215.40

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Solution

The fourth proportional to 141,875.31, 195,789.45 and 78,215.40 is: 107,938.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,875.31 : 195,789.45 = 78,215.40 : x
  2. Step 2: Convert to fraction form
    141,875.31/195,789.45 = 78,215.40/x
  3. Step 3: Cross multiply
    141,875.31x = 195,789.45 × 78,215.40
  4. Step 4: Simplify right side
    141,875.31x = 15,313,750,147.53
  5. Step 5: Solve for x
    x = 15,313,750,147.53/141,875.31
  6. Step 6: Final answer
    x = 107,938.09

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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.