Home / 101,399.19-139,928.36-56,079.69

Finding the Fourth Proportional to 101,399.19, 139,928.36 and 56,079.69

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Solution

The fourth proportional to 101,399.19, 139,928.36 and 56,079.69 is: 77,388.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,399.19 : 139,928.36 = 56,079.69 : x
  2. Step 2: Convert to fraction form
    101,399.19/139,928.36 = 56,079.69/x
  3. Step 3: Cross multiply
    101,399.19x = 139,928.36 × 56,079.69
  4. Step 4: Simplify right side
    101,399.19x = 7,847,138,770.61
  5. Step 5: Solve for x
    x = 7,847,138,770.61/101,399.19
  6. Step 6: Final answer
    x = 77,388.57

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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.