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Finding the Fourth Proportional to 159,514.92, 220,128.81 and 90,603.90

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Solution

The fourth proportional to 159,514.92, 220,128.81 and 90,603.90 is: 125,032.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,514.92 : 220,128.81 = 90,603.90 : x
  2. Step 2: Convert to fraction form
    159,514.92/220,128.81 = 90,603.90/x
  3. Step 3: Cross multiply
    159,514.92x = 220,128.81 × 90,603.90
  4. Step 4: Simplify right side
    159,514.92x = 19,944,528,688.36
  5. Step 5: Solve for x
    x = 19,944,528,688.36/159,514.92
  6. Step 6: Final answer
    x = 125,032.37

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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.