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Finding the Fourth Proportional to 213,914.88, 320,841.60 and 66,151.68

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Solution

The fourth proportional to 213,914.88, 320,841.60 and 66,151.68 is: 99,218.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,914.88 : 320,841.60 = 66,151.68 : x
  2. Step 2: Convert to fraction form
    213,914.88/320,841.60 = 66,151.68/x
  3. Step 3: Cross multiply
    213,914.88x = 320,841.60 × 66,151.68
  4. Step 4: Simplify right side
    213,914.88x = 21,224,210,853.89
  5. Step 5: Solve for x
    x = 21,224,210,853.89/213,914.88
  6. Step 6: Final answer
    x = 99,218.02

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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.