Home / 138,154.78-190,651.73-77,725.52

Finding the Fourth Proportional to 138,154.78, 190,651.73 and 77,725.52

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Solution

The fourth proportional to 138,154.78, 190,651.73 and 77,725.52 is: 107,260.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,154.78 : 190,651.73 = 77,725.52 : x
  2. Step 2: Convert to fraction form
    138,154.78/190,651.73 = 77,725.52/x
  3. Step 3: Cross multiply
    138,154.78x = 190,651.73 × 77,725.52
  4. Step 4: Simplify right side
    138,154.78x = 14,818,505,298.62
  5. Step 5: Solve for x
    x = 14,818,505,298.62/138,154.78
  6. Step 6: Final answer
    x = 107,260.17

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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.