Home / 138,398.23-191,003.69-84,718.72

Finding the Fourth Proportional to 138,398.23, 191,003.69 and 84,718.72

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Solution

The fourth proportional to 138,398.23, 191,003.69 and 84,718.72 is: 116,920.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,398.23 : 191,003.69 = 84,718.72 : x
  2. Step 2: Convert to fraction form
    138,398.23/191,003.69 = 84,718.72/x
  3. Step 3: Cross multiply
    138,398.23x = 191,003.69 × 84,718.72
  4. Step 4: Simplify right side
    138,398.23x = 16,181,586,753.46
  5. Step 5: Solve for x
    x = 16,181,586,753.46/138,398.23
  6. Step 6: Final answer
    x = 116,920.48

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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.