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Finding the Fourth Proportional to 215,358.76, 323,084.29 and 65,611.12

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Solution

The fourth proportional to 215,358.76, 323,084.29 and 65,611.12 is: 98,430.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,358.76 : 323,084.29 = 65,611.12 : x
  2. Step 2: Convert to fraction form
    215,358.76/323,084.29 = 65,611.12/x
  3. Step 3: Cross multiply
    215,358.76x = 323,084.29 × 65,611.12
  4. Step 4: Simplify right side
    215,358.76x = 21,197,921,395.61
  5. Step 5: Solve for x
    x = 21,197,921,395.61/215,358.76
  6. Step 6: Final answer
    x = 98,430.74

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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.