Home / 138,022.68-190,447.98-77,585.28

Finding the Fourth Proportional to 138,022.68, 190,447.98 and 77,585.28

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Solution

The fourth proportional to 138,022.68, 190,447.98 and 77,585.28 is: 107,054.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,022.68 : 190,447.98 = 77,585.28 : x
  2. Step 2: Convert to fraction form
    138,022.68/190,447.98 = 77,585.28/x
  3. Step 3: Cross multiply
    138,022.68x = 190,447.98 × 77,585.28
  4. Step 4: Simplify right side
    138,022.68x = 14,775,959,853.73
  5. Step 5: Solve for x
    x = 14,775,959,853.73/138,022.68
  6. Step 6: Final answer
    x = 107,054.58

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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.