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Finding the Fourth Proportional to 216,497.72, 298,761.72 and 121,013.30

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Solution

The fourth proportional to 216,497.72, 298,761.72 and 121,013.30 is: 166,995.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,497.72 : 298,761.72 = 121,013.30 : x
  2. Step 2: Convert to fraction form
    216,497.72/298,761.72 = 121,013.30/x
  3. Step 3: Cross multiply
    216,497.72x = 298,761.72 × 121,013.30
  4. Step 4: Simplify right side
    216,497.72x = 36,154,141,650.88
  5. Step 5: Solve for x
    x = 36,154,141,650.88/216,497.72
  6. Step 6: Final answer
    x = 166,995.48

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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.