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Finding the Fourth Proportional to 101,010.68, 139,392.16 and 55,687.60

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Solution

The fourth proportional to 101,010.68, 139,392.16 and 55,687.60 is: 76,847.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,010.68 : 139,392.16 = 55,687.60 : x
  2. Step 2: Convert to fraction form
    101,010.68/139,392.16 = 55,687.60/x
  3. Step 3: Cross multiply
    101,010.68x = 139,392.16 × 55,687.60
  4. Step 4: Simplify right side
    101,010.68x = 7,762,414,361.52
  5. Step 5: Solve for x
    x = 7,762,414,361.52/101,010.68
  6. Step 6: Final answer
    x = 76,847.47

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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.