Home / 215,911.09-323,876.36-66,140.47

Finding the Fourth Proportional to 215,911.09, 323,876.36 and 66,140.47

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Solution

The fourth proportional to 215,911.09, 323,876.36 and 66,140.47 is: 99,213.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,911.09 : 323,876.36 = 66,140.47 : x
  2. Step 2: Convert to fraction form
    215,911.09/323,876.36 = 66,140.47/x
  3. Step 3: Cross multiply
    215,911.09x = 323,876.36 × 66,140.47
  4. Step 4: Simplify right side
    215,911.09x = 21,421,334,672.29
  5. Step 5: Solve for x
    x = 21,421,334,672.29/215,911.09
  6. Step 6: Final answer
    x = 99,213.68

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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.