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Finding the Fourth Proportional to 101,539.50, 140,105.07 and 65,724.54

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Solution

The fourth proportional to 101,539.50, 140,105.07 and 65,724.54 is: 90,687.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,539.50 : 140,105.07 = 65,724.54 : x
  2. Step 2: Convert to fraction form
    101,539.50/140,105.07 = 65,724.54/x
  3. Step 3: Cross multiply
    101,539.50x = 140,105.07 × 65,724.54
  4. Step 4: Simplify right side
    101,539.50x = 9,208,341,277.42
  5. Step 5: Solve for x
    x = 9,208,341,277.42/101,539.50
  6. Step 6: Final answer
    x = 90,687.28

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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.