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Finding the Fourth Proportional to 216,774.78, 299,149.20 and 121,303.92

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Solution

The fourth proportional to 216,774.78, 299,149.20 and 121,303.92 is: 167,399.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,774.78 : 299,149.20 = 121,303.92 : x
  2. Step 2: Convert to fraction form
    216,774.78/299,149.20 = 121,303.92/x
  3. Step 3: Cross multiply
    216,774.78x = 299,149.20 × 121,303.92
  4. Step 4: Simplify right side
    216,774.78x = 36,287,970,624.86
  5. Step 5: Solve for x
    x = 36,287,970,624.86/216,774.78
  6. Step 6: Final answer
    x = 167,399.41

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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.