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Finding the Fourth Proportional to 85,698.90, 128,548.35 and 60,767.10

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Solution

The fourth proportional to 85,698.90, 128,548.35 and 60,767.10 is: 91,150.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,698.90 : 128,548.35 = 60,767.10 : x
  2. Step 2: Convert to fraction form
    85,698.90/128,548.35 = 60,767.10/x
  3. Step 3: Cross multiply
    85,698.90x = 128,548.35 × 60,767.10
  4. Step 4: Simplify right side
    85,698.90x = 7,811,510,439.29
  5. Step 5: Solve for x
    x = 7,811,510,439.29/85,698.90
  6. Step 6: Final answer
    x = 91,150.65

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Similar ratio
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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.