Home / 138,291.24-190,844.34-81,702.48

Finding the Fourth Proportional to 138,291.24, 190,844.34 and 81,702.48

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Solution

The fourth proportional to 138,291.24, 190,844.34 and 81,702.48 is: 112,750.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,291.24 : 190,844.34 = 81,702.48 : x
  2. Step 2: Convert to fraction form
    138,291.24/190,844.34 = 81,702.48/x
  3. Step 3: Cross multiply
    138,291.24x = 190,844.34 × 81,702.48
  4. Step 4: Simplify right side
    138,291.24x = 15,592,455,871.96
  5. Step 5: Solve for x
    x = 15,592,455,871.96/138,291.24
  6. Step 6: Final answer
    x = 112,750.86

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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.