Home / 138,389.40-190,920.72-102,177.48

Finding the Fourth Proportional to 138,389.40, 190,920.72 and 102,177.48

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Solution

The fourth proportional to 138,389.40, 190,920.72 and 102,177.48 is: 140,963.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,389.40 : 190,920.72 = 102,177.48 : x
  2. Step 2: Convert to fraction form
    138,389.40/190,920.72 = 102,177.48/x
  3. Step 3: Cross multiply
    138,389.40x = 190,920.72 × 102,177.48
  4. Step 4: Simplify right side
    138,389.40x = 19,507,798,049.39
  5. Step 5: Solve for x
    x = 19,507,798,049.39/138,389.40
  6. Step 6: Final answer
    x = 140,963.09

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1.5x scale

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.