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Finding the Fourth Proportional to 85,089.60, 127,691.80 and 64,045.19

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Solution

The fourth proportional to 85,089.60, 127,691.80 and 64,045.19 is: 96,110.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,089.60 : 127,691.80 = 64,045.19 : x
  2. Step 2: Convert to fraction form
    85,089.60/127,691.80 = 64,045.19/x
  3. Step 3: Cross multiply
    85,089.60x = 127,691.80 × 64,045.19
  4. Step 4: Simplify right side
    85,089.60x = 8,178,045,751.56
  5. Step 5: Solve for x
    x = 8,178,045,751.56/85,089.60
  6. Step 6: Final answer
    x = 96,110.99

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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.