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Finding the Fourth Proportional to 70,817.72, 97,724.68 and 38,980.48

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Solution

The fourth proportional to 70,817.72, 97,724.68 and 38,980.48 is: 53,790.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,817.72 : 97,724.68 = 38,980.48 : x
  2. Step 2: Convert to fraction form
    70,817.72/97,724.68 = 38,980.48/x
  3. Step 3: Cross multiply
    70,817.72x = 97,724.68 × 38,980.48
  4. Step 4: Simplify right side
    70,817.72x = 3,809,354,934.25
  5. Step 5: Solve for x
    x = 3,809,354,934.25/70,817.72
  6. Step 6: Final answer
    x = 53,790.99

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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.