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Finding the Fourth Proportional to 125,298.56, 172,911.84 and 68,709.92

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Solution

The fourth proportional to 125,298.56, 172,911.84 and 68,709.92 is: 94,819.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,298.56 : 172,911.84 = 68,709.92 : x
  2. Step 2: Convert to fraction form
    125,298.56/172,911.84 = 68,709.92/x
  3. Step 3: Cross multiply
    125,298.56x = 172,911.84 × 68,709.92
  4. Step 4: Simplify right side
    125,298.56x = 11,880,758,693.45
  5. Step 5: Solve for x
    x = 11,880,758,693.45/125,298.56
  6. Step 6: Final answer
    x = 94,819.59

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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.