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Finding the Fourth Proportional to 69,314.40, 95,968.80 and 65,815.20

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Solution

The fourth proportional to 69,314.40, 95,968.80 and 65,815.20 is: 91,124.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,314.40 : 95,968.80 = 65,815.20 : x
  2. Step 2: Convert to fraction form
    69,314.40/95,968.80 = 65,815.20/x
  3. Step 3: Cross multiply
    69,314.40x = 95,968.80 × 65,815.20
  4. Step 4: Simplify right side
    69,314.40x = 6,316,205,765.76
  5. Step 5: Solve for x
    x = 6,316,205,765.76/69,314.40
  6. Step 6: Final answer
    x = 91,124.01

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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.