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Finding the Fourth Proportional to 86,711.58, 130,126.50 and 39,964.86

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Solution

The fourth proportional to 86,711.58, 130,126.50 and 39,964.86 is: 59,974.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,711.58 : 130,126.50 = 39,964.86 : x
  2. Step 2: Convert to fraction form
    86,711.58/130,126.50 = 39,964.86/x
  3. Step 3: Cross multiply
    86,711.58x = 130,126.50 × 39,964.86
  4. Step 4: Simplify right side
    86,711.58x = 5,200,487,354.79
  5. Step 5: Solve for x
    x = 5,200,487,354.79/86,711.58
  6. Step 6: Final answer
    x = 59,974.54

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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.