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Finding the Fourth Proportional to 71,000.78, 97,981.06 and 39,169.68

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Solution

The fourth proportional to 71,000.78, 97,981.06 and 39,169.68 is: 54,054.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,000.78 : 97,981.06 = 39,169.68 : x
  2. Step 2: Convert to fraction form
    71,000.78/97,981.06 = 39,169.68/x
  3. Step 3: Cross multiply
    71,000.78x = 97,981.06 × 39,169.68
  4. Step 4: Simplify right side
    71,000.78x = 3,837,886,766.26
  5. Step 5: Solve for x
    x = 3,837,886,766.26/71,000.78
  6. Step 6: Final answer
    x = 54,054.15

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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.