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Finding the Fourth Proportional to 125,898.30, 173,769.30 and 78,187.68

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Solution

The fourth proportional to 125,898.30, 173,769.30 and 78,187.68 is: 107,917.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,898.30 : 173,769.30 = 78,187.68 : x
  2. Step 2: Convert to fraction form
    125,898.30/173,769.30 = 78,187.68/x
  3. Step 3: Cross multiply
    125,898.30x = 173,769.30 × 78,187.68
  4. Step 4: Simplify right side
    125,898.30x = 13,586,618,422.22
  5. Step 5: Solve for x
    x = 13,586,618,422.22/125,898.30
  6. Step 6: Final answer
    x = 107,917.41

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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.