Home / 138,204.36-190,719.81-77,774.99

Finding the Fourth Proportional to 138,204.36, 190,719.81 and 77,774.99

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Solution

The fourth proportional to 138,204.36, 190,719.81 and 77,774.99 is: 107,328.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,204.36 : 190,719.81 = 77,774.99 : x
  2. Step 2: Convert to fraction form
    138,204.36/190,719.81 = 77,774.99/x
  3. Step 3: Cross multiply
    138,204.36x = 190,719.81 × 77,774.99
  4. Step 4: Simplify right side
    138,204.36x = 14,833,230,361.95
  5. Step 5: Solve for x
    x = 14,833,230,361.95/138,204.36
  6. Step 6: Final answer
    x = 107,328.24

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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.