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Finding the Fourth Proportional to 159,494.40, 220,109.81 and 90,588.92

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Solution

The fourth proportional to 159,494.40, 220,109.81 and 90,588.92 is: 125,016.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,494.40 : 220,109.81 = 90,588.92 : x
  2. Step 2: Convert to fraction form
    159,494.40/220,109.81 = 90,588.92/x
  3. Step 3: Cross multiply
    159,494.40x = 220,109.81 × 90,588.92
  4. Step 4: Simplify right side
    159,494.40x = 19,939,508,415.81
  5. Step 5: Solve for x
    x = 19,939,508,415.81/159,494.40
  6. Step 6: Final answer
    x = 125,016.98

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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.