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Finding the Fourth Proportional to 125,910.90, 188,866.35 and 70,499.70

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Solution

The fourth proportional to 125,910.90, 188,866.35 and 70,499.70 is: 105,749.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,910.90 : 188,866.35 = 70,499.70 : x
  2. Step 2: Convert to fraction form
    125,910.90/188,866.35 = 70,499.70/x
  3. Step 3: Cross multiply
    125,910.90x = 188,866.35 × 70,499.70
  4. Step 4: Simplify right side
    125,910.90x = 13,315,021,015.10
  5. Step 5: Solve for x
    x = 13,315,021,015.10/125,910.90
  6. Step 6: Final answer
    x = 105,749.55

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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.