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Finding the Fourth Proportional to 186,853.05, 280,271.66 and 86,978.79

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Solution

The fourth proportional to 186,853.05, 280,271.66 and 86,978.79 is: 130,464.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,853.05 : 280,271.66 = 86,978.79 : x
  2. Step 2: Convert to fraction form
    186,853.05/280,271.66 = 86,978.79/x
  3. Step 3: Cross multiply
    186,853.05x = 280,271.66 × 86,978.79
  4. Step 4: Simplify right side
    186,853.05x = 24,377,689,423.20
  5. Step 5: Solve for x
    x = 24,377,689,423.20/186,853.05
  6. Step 6: Final answer
    x = 130,464.50

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1.5x scale

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.