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Finding the Fourth Proportional to 112,500, 168,666.71 and 68,116.32

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Solution

The fourth proportional to 112,500, 168,666.71 and 68,116.32 is: 102,124.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,500 : 168,666.71 = 68,116.32 : x
  2. Step 2: Convert to fraction form
    112,500/168,666.71 = 68,116.32/x
  3. Step 3: Cross multiply
    112,500x = 168,666.71 × 68,116.32
  4. Step 4: Simplify right side
    112,500x = 11,488,955,251.13
  5. Step 5: Solve for x
    x = 11,488,955,251.13/112,500
  6. Step 6: Final answer
    x = 102,124.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.