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Finding the Fourth Proportional to 70,329.42, 105,325.20 and 40,252.50

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Solution

The fourth proportional to 70,329.42, 105,325.20 and 40,252.50 is: 60,282.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,329.42 : 105,325.20 = 40,252.50 : x
  2. Step 2: Convert to fraction form
    70,329.42/105,325.20 = 40,252.50/x
  3. Step 3: Cross multiply
    70,329.42x = 105,325.20 × 40,252.50
  4. Step 4: Simplify right side
    70,329.42x = 4,239,602,613
  5. Step 5: Solve for x
    x = 4,239,602,613/70,329.42
  6. Step 6: Final answer
    x = 60,282.06

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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.