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Finding the Fourth Proportional to 261,011.54, 391,575.66 and 83,529.20

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Solution

The fourth proportional to 261,011.54, 391,575.66 and 83,529.20 is: 125,312.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,011.54 : 391,575.66 = 83,529.20 : x
  2. Step 2: Convert to fraction form
    261,011.54/391,575.66 = 83,529.20/x
  3. Step 3: Cross multiply
    261,011.54x = 391,575.66 × 83,529.20
  4. Step 4: Simplify right side
    261,011.54x = 32,708,001,619.27
  5. Step 5: Solve for x
    x = 32,708,001,619.27/261,011.54
  6. Step 6: Final answer
    x = 125,312.47

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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.