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Finding the Fourth Proportional to 159,853.45, 220,603.11 and 87,260.65

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Solution

The fourth proportional to 159,853.45, 220,603.11 and 87,260.65 is: 120,422.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,853.45 : 220,603.11 = 87,260.65 : x
  2. Step 2: Convert to fraction form
    159,853.45/220,603.11 = 87,260.65/x
  3. Step 3: Cross multiply
    159,853.45x = 220,603.11 × 87,260.65
  4. Step 4: Simplify right side
    159,853.45x = 19,249,970,334.32
  5. Step 5: Solve for x
    x = 19,249,970,334.32/159,853.45
  6. Step 6: Final answer
    x = 120,422.61

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1.5x scale

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.