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Finding the Fourth Proportional to 113,705.92, 156,912.91 and 62,720.80

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Solution

The fourth proportional to 113,705.92, 156,912.91 and 62,720.80 is: 86,554.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,705.92 : 156,912.91 = 62,720.80 : x
  2. Step 2: Convert to fraction form
    113,705.92/156,912.91 = 62,720.80/x
  3. Step 3: Cross multiply
    113,705.92x = 156,912.91 × 62,720.80
  4. Step 4: Simplify right side
    113,705.92x = 9,841,703,794.61
  5. Step 5: Solve for x
    x = 9,841,703,794.61/113,705.92
  6. Step 6: Final answer
    x = 86,554.01

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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.