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Finding the Fourth Proportional to 61,039.57, 91,554.15 and 18,918.70

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Solution

The fourth proportional to 61,039.57, 91,554.15 and 18,918.70 is: 28,376.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,039.57 : 91,554.15 = 18,918.70 : x
  2. Step 2: Convert to fraction form
    61,039.57/91,554.15 = 18,918.70/x
  3. Step 3: Cross multiply
    61,039.57x = 91,554.15 × 18,918.70
  4. Step 4: Simplify right side
    61,039.57x = 1,732,085,497.61
  5. Step 5: Solve for x
    x = 1,732,085,497.61/61,039.57
  6. Step 6: Final answer
    x = 28,376.44

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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.