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Finding the Fourth Proportional to 135,176.79, 186,567.12 and 78,620.97

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Solution

The fourth proportional to 135,176.79, 186,567.12 and 78,620.97 is: 108,510.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,176.79 : 186,567.12 = 78,620.97 : x
  2. Step 2: Convert to fraction form
    135,176.79/186,567.12 = 78,620.97/x
  3. Step 3: Cross multiply
    135,176.79x = 186,567.12 × 78,620.97
  4. Step 4: Simplify right side
    135,176.79x = 14,668,087,944.51
  5. Step 5: Solve for x
    x = 14,668,087,944.51/135,176.79
  6. Step 6: Final answer
    x = 108,510.40

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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.