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Finding the Fourth Proportional to 216,715, 299,079.96 and 121,228.12

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Solution

The fourth proportional to 216,715, 299,079.96 and 121,228.12 is: 167,302.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,715 : 299,079.96 = 121,228.12 : x
  2. Step 2: Convert to fraction form
    216,715/299,079.96 = 121,228.12/x
  3. Step 3: Cross multiply
    216,715x = 299,079.96 × 121,228.12
  4. Step 4: Simplify right side
    216,715x = 36,256,901,280.48
  5. Step 5: Solve for x
    x = 36,256,901,280.48/216,715
  6. Step 6: Final answer
    x = 167,302.22

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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.