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Finding the Fourth Proportional to 207,680.63, 286,694.94 and 121,627.64

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Solution

The fourth proportional to 207,680.63, 286,694.94 and 121,627.64 is: 167,902.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,680.63 : 286,694.94 = 121,627.64 : x
  2. Step 2: Convert to fraction form
    207,680.63/286,694.94 = 121,627.64/x
  3. Step 3: Cross multiply
    207,680.63x = 286,694.94 × 121,627.64
  4. Step 4: Simplify right side
    207,680.63x = 34,870,027,518.67
  5. Step 5: Solve for x
    x = 34,870,027,518.67/207,680.63
  6. Step 6: Final answer
    x = 167,902.17

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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.