Home / 138,808.81-191,587.78-90,325.29

Finding the Fourth Proportional to 138,808.81, 191,587.78 and 90,325.29

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Solution

The fourth proportional to 138,808.81, 191,587.78 and 90,325.29 is: 124,669.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,808.81 : 191,587.78 = 90,325.29 : x
  2. Step 2: Convert to fraction form
    138,808.81/191,587.78 = 90,325.29/x
  3. Step 3: Cross multiply
    138,808.81x = 191,587.78 × 90,325.29
  4. Step 4: Simplify right side
    138,808.81x = 17,305,222,620.32
  5. Step 5: Solve for x
    x = 17,305,222,620.32/138,808.81
  6. Step 6: Final answer
    x = 124,669.48

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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.