Home / 138,241.28-190,773.36-77,812.85

Finding the Fourth Proportional to 138,241.28, 190,773.36 and 77,812.85

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Solution

The fourth proportional to 138,241.28, 190,773.36 and 77,812.85 is: 107,381.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,241.28 : 190,773.36 = 77,812.85 : x
  2. Step 2: Convert to fraction form
    138,241.28/190,773.36 = 77,812.85/x
  3. Step 3: Cross multiply
    138,241.28x = 190,773.36 × 77,812.85
  4. Step 4: Simplify right side
    138,241.28x = 14,844,619,322.61
  5. Step 5: Solve for x
    x = 14,844,619,322.61/138,241.28
  6. Step 6: Final answer
    x = 107,381.96

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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.