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Finding the Fourth Proportional to 86,352.40, 129,392.16 and 65,192.32

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Solution

The fourth proportional to 86,352.40, 129,392.16 and 65,192.32 is: 97,685.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,352.40 : 129,392.16 = 65,192.32 : x
  2. Step 2: Convert to fraction form
    86,352.40/129,392.16 = 65,192.32/x
  3. Step 3: Cross multiply
    86,352.40x = 129,392.16 × 65,192.32
  4. Step 4: Simplify right side
    86,352.40x = 8,435,375,100.21
  5. Step 5: Solve for x
    x = 8,435,375,100.21/86,352.40
  6. Step 6: Final answer
    x = 97,685.47

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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.