Home / 138,021.68-190,446.60-77,584.28

Finding the Fourth Proportional to 138,021.68, 190,446.60 and 77,584.28

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Solution

The fourth proportional to 138,021.68, 190,446.60 and 77,584.28 is: 107,053.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,021.68 : 190,446.60 = 77,584.28 : x
  2. Step 2: Convert to fraction form
    138,021.68/190,446.60 = 77,584.28/x
  3. Step 3: Cross multiply
    138,021.68x = 190,446.60 × 77,584.28
  4. Step 4: Simplify right side
    138,021.68x = 14,775,662,339.45
  5. Step 5: Solve for x
    x = 14,775,662,339.45/138,021.68
  6. Step 6: Final answer
    x = 107,053.20

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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.