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Finding the Fourth Proportional to 124,692.64, 172,068.16 and 68,100.64

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Solution

The fourth proportional to 124,692.64, 172,068.16 and 68,100.64 is: 93,974.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,692.64 : 172,068.16 = 68,100.64 : x
  2. Step 2: Convert to fraction form
    124,692.64/172,068.16 = 68,100.64/x
  3. Step 3: Cross multiply
    124,692.64x = 172,068.16 × 68,100.64
  4. Step 4: Simplify right side
    124,692.64x = 11,717,951,819.62
  5. Step 5: Solve for x
    x = 11,717,951,819.62/124,692.64
  6. Step 6: Final answer
    x = 93,974.69

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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.