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Finding the Fourth Proportional to 101,639.53, 140,278.94 and 65,933.38

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Solution

The fourth proportional to 101,639.53, 140,278.94 and 65,933.38 is: 90,998.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,639.53 : 140,278.94 = 65,933.38 : x
  2. Step 2: Convert to fraction form
    101,639.53/140,278.94 = 65,933.38/x
  3. Step 3: Cross multiply
    101,639.53x = 140,278.94 × 65,933.38
  4. Step 4: Simplify right side
    101,639.53x = 9,249,064,657.02
  5. Step 5: Solve for x
    x = 9,249,064,657.02/101,639.53
  6. Step 6: Final answer
    x = 90,998.70

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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.