Home / 138,141.18-190,619.39-77,710.58

Finding the Fourth Proportional to 138,141.18, 190,619.39 and 77,710.58

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Solution

The fourth proportional to 138,141.18, 190,619.39 and 77,710.58 is: 107,231.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,141.18 : 190,619.39 = 77,710.58 : x
  2. Step 2: Convert to fraction form
    138,141.18/190,619.39 = 77,710.58/x
  3. Step 3: Cross multiply
    138,141.18x = 190,619.39 × 77,710.58
  4. Step 4: Simplify right side
    138,141.18x = 14,813,143,356.15
  5. Step 5: Solve for x
    x = 14,813,143,356.15/138,141.18
  6. Step 6: Final answer
    x = 107,231.92

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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.