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Finding the Fourth Proportional to 61,423.92, 92,039.90 and 42,740.46

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Solution

The fourth proportional to 61,423.92, 92,039.90 and 42,740.46 is: 64,043.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,423.92 : 92,039.90 = 42,740.46 : x
  2. Step 2: Convert to fraction form
    61,423.92/92,039.90 = 42,740.46/x
  3. Step 3: Cross multiply
    61,423.92x = 92,039.90 × 42,740.46
  4. Step 4: Simplify right side
    61,423.92x = 3,933,827,450.65
  5. Step 5: Solve for x
    x = 3,933,827,450.65/61,423.92
  6. Step 6: Final answer
    x = 64,043.90

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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.