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Finding the Fourth Proportional to 214,188.40, 321,628.20 and 161,657.20

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Solution

The fourth proportional to 214,188.40, 321,628.20 and 161,657.20 is: 242,746.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,188.40 : 321,628.20 = 161,657.20 : x
  2. Step 2: Convert to fraction form
    214,188.40/321,628.20 = 161,657.20/x
  3. Step 3: Cross multiply
    214,188.40x = 321,628.20 × 161,657.20
  4. Step 4: Simplify right side
    214,188.40x = 51,993,514,253.04
  5. Step 5: Solve for x
    x = 51,993,514,253.04/214,188.40
  6. Step 6: Final answer
    x = 242,746.64

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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.