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Finding the Fourth Proportional to 216,685.14, 299,040.78 and 121,200.72

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Solution

The fourth proportional to 216,685.14, 299,040.78 and 121,200.72 is: 167,265.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,685.14 : 299,040.78 = 121,200.72 : x
  2. Step 2: Convert to fraction form
    216,685.14/299,040.78 = 121,200.72/x
  3. Step 3: Cross multiply
    216,685.14x = 299,040.78 × 121,200.72
  4. Step 4: Simplify right side
    216,685.14x = 36,243,957,845.36
  5. Step 5: Solve for x
    x = 36,243,957,845.36/216,685.14
  6. Step 6: Final answer
    x = 167,265.54

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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.