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Finding the Fourth Proportional to 216,897.20, 299,324.52 and 121,403.60

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Solution

The fourth proportional to 216,897.20, 299,324.52 and 121,403.60 is: 167,540.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,897.20 : 299,324.52 = 121,403.60 : x
  2. Step 2: Convert to fraction form
    216,897.20/299,324.52 = 121,403.60/x
  3. Step 3: Cross multiply
    216,897.20x = 299,324.52 × 121,403.60
  4. Step 4: Simplify right side
    216,897.20x = 36,339,074,296.27
  5. Step 5: Solve for x
    x = 36,339,074,296.27/216,897.20
  6. Step 6: Final answer
    x = 167,540.54

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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.