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Finding the Fourth Proportional to 85,666.01, 128,265.73 and 66,624.53

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Solution

The fourth proportional to 85,666.01, 128,265.73 and 66,624.53 is: 99,755.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,666.01 : 128,265.73 = 66,624.53 : x
  2. Step 2: Convert to fraction form
    85,666.01/128,265.73 = 66,624.53/x
  3. Step 3: Cross multiply
    85,666.01x = 128,265.73 × 66,624.53
  4. Step 4: Simplify right side
    85,666.01x = 8,545,643,168.47
  5. Step 5: Solve for x
    x = 8,545,643,168.47/85,666.01
  6. Step 6: Final answer
    x = 99,755.36

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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.