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Finding the Fourth Proportional to 261,416.76, 392,176.20 and 83,910.12

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Solution

The fourth proportional to 261,416.76, 392,176.20 and 83,910.12 is: 125,881.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,416.76 : 392,176.20 = 83,910.12 : x
  2. Step 2: Convert to fraction form
    261,416.76/392,176.20 = 83,910.12/x
  3. Step 3: Cross multiply
    261,416.76x = 392,176.20 × 83,910.12
  4. Step 4: Simplify right side
    261,416.76x = 32,907,552,003.14
  5. Step 5: Solve for x
    x = 32,907,552,003.14/261,416.76
  6. Step 6: Final answer
    x = 125,881.57

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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.