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Finding the Fourth Proportional to 220,054.21, 330,081.32 and 120,159.90

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Solution

The fourth proportional to 220,054.21, 330,081.32 and 120,159.90 is: 180,239.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,054.21 : 330,081.32 = 120,159.90 : x
  2. Step 2: Convert to fraction form
    220,054.21/330,081.32 = 120,159.90/x
  3. Step 3: Cross multiply
    220,054.21x = 330,081.32 × 120,159.90
  4. Step 4: Simplify right side
    220,054.21x = 39,662,537,802.27
  5. Step 5: Solve for x
    x = 39,662,537,802.27/220,054.21
  6. Step 6: Final answer
    x = 180,239.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.