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Finding the Fourth Proportional to 86,563.49, 129,503.60 and 65,564.06

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Solution

The fourth proportional to 86,563.49, 129,503.60 and 65,564.06 is: 98,087.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,563.49 : 129,503.60 = 65,564.06 : x
  2. Step 2: Convert to fraction form
    86,563.49/129,503.60 = 65,564.06/x
  3. Step 3: Cross multiply
    86,563.49x = 129,503.60 × 65,564.06
  4. Step 4: Simplify right side
    86,563.49x = 8,490,781,472.80
  5. Step 5: Solve for x
    x = 8,490,781,472.80/86,563.49
  6. Step 6: Final answer
    x = 98,087.33

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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.