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Finding the Fourth Proportional to 216,634.69, 298,983.72 and 121,146.76

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Solution

The fourth proportional to 216,634.69, 298,983.72 and 121,146.76 is: 167,198.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,634.69 : 298,983.72 = 121,146.76 : x
  2. Step 2: Convert to fraction form
    216,634.69/298,983.72 = 121,146.76/x
  3. Step 3: Cross multiply
    216,634.69x = 298,983.72 × 121,146.76
  4. Step 4: Simplify right side
    216,634.69x = 36,220,908,970.75
  5. Step 5: Solve for x
    x = 36,220,908,970.75/216,634.69
  6. Step 6: Final answer
    x = 167,198.10

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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.