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Finding the Fourth Proportional to 101,539, 140,104.38 and 65,724.04

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Solution

The fourth proportional to 101,539, 140,104.38 and 65,724.04 is: 90,686.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,539 : 140,104.38 = 65,724.04 : x
  2. Step 2: Convert to fraction form
    101,539/140,104.38 = 65,724.04/x
  3. Step 3: Cross multiply
    101,539x = 140,104.38 × 65,724.04
  4. Step 4: Simplify right side
    101,539x = 9,208,225,875.30
  5. Step 5: Solve for x
    x = 9,208,225,875.30/101,539
  6. Step 6: Final answer
    x = 90,686.59

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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.