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Finding the Fourth Proportional to 66,374.40, 91,609.20 and 38,098.56

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Solution

The fourth proportional to 66,374.40, 91,609.20 and 38,098.56 is: 52,583.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,374.40 : 91,609.20 = 38,098.56 : x
  2. Step 2: Convert to fraction form
    66,374.40/91,609.20 = 38,098.56/x
  3. Step 3: Cross multiply
    66,374.40x = 91,609.20 × 38,098.56
  4. Step 4: Simplify right side
    66,374.40x = 3,490,178,602.75
  5. Step 5: Solve for x
    x = 3,490,178,602.75/66,374.40
  6. Step 6: Final answer
    x = 52,583.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.