Home / 138,719.40-191,412.24-84,243.24

Finding the Fourth Proportional to 138,719.40, 191,412.24 and 84,243.24

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Solution

The fourth proportional to 138,719.40, 191,412.24 and 84,243.24 is: 116,243.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,719.40 : 191,412.24 = 84,243.24 : x
  2. Step 2: Convert to fraction form
    138,719.40/191,412.24 = 84,243.24/x
  3. Step 3: Cross multiply
    138,719.40x = 191,412.24 × 84,243.24
  4. Step 4: Simplify right side
    138,719.40x = 16,125,187,273.26
  5. Step 5: Solve for x
    x = 16,125,187,273.26/138,719.40
  6. Step 6: Final answer
    x = 116,243.20

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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.