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Finding the Fourth Proportional to 66,909.60, 99,599.94 and 65,912.76

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Solution

The fourth proportional to 66,909.60, 99,599.94 and 65,912.76 is: 98,116.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,909.60 : 99,599.94 = 65,912.76 : x
  2. Step 2: Convert to fraction form
    66,909.60/99,599.94 = 65,912.76/x
  3. Step 3: Cross multiply
    66,909.60x = 99,599.94 × 65,912.76
  4. Step 4: Simplify right side
    66,909.60x = 6,564,906,941.23
  5. Step 5: Solve for x
    x = 6,564,906,941.23/66,909.60
  6. Step 6: Final answer
    x = 98,116.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.