Home / 191,780.39-287,824.66-86,608.55

Finding the Fourth Proportional to 191,780.39, 287,824.66 and 86,608.55

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Solution

The fourth proportional to 191,780.39, 287,824.66 and 86,608.55 is: 129,982.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,780.39 : 287,824.66 = 86,608.55 : x
  2. Step 2: Convert to fraction form
    191,780.39/287,824.66 = 86,608.55/x
  3. Step 3: Cross multiply
    191,780.39x = 287,824.66 × 86,608.55
  4. Step 4: Simplify right side
    191,780.39x = 24,928,074,801.20
  5. Step 5: Solve for x
    x = 24,928,074,801.20/191,780.39
  6. Step 6: Final answer
    x = 129,982.40

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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.