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Finding the Fourth Proportional to 101,107.80, 139,527.84 and 55,786.20

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Solution

The fourth proportional to 101,107.80, 139,527.84 and 55,786.20 is: 76,984.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,107.80 : 139,527.84 = 55,786.20 : x
  2. Step 2: Convert to fraction form
    101,107.80/139,527.84 = 55,786.20/x
  3. Step 3: Cross multiply
    101,107.80x = 139,527.84 × 55,786.20
  4. Step 4: Simplify right side
    101,107.80x = 7,783,727,987.81
  5. Step 5: Solve for x
    x = 7,783,727,987.81/101,107.80
  6. Step 6: Final answer
    x = 76,984.45

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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.