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Finding the Fourth Proportional to 125,118.45, 187,206.81 and 87,751.45

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Solution

The fourth proportional to 125,118.45, 187,206.81 and 87,751.45 is: 131,296.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,118.45 : 187,206.81 = 87,751.45 : x
  2. Step 2: Convert to fraction form
    125,118.45/187,206.81 = 87,751.45/x
  3. Step 3: Cross multiply
    125,118.45x = 187,206.81 × 87,751.45
  4. Step 4: Simplify right side
    125,118.45x = 16,427,669,027.37
  5. Step 5: Solve for x
    x = 16,427,669,027.37/125,118.45
  6. Step 6: Final answer
    x = 131,296.94

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1.5x scale

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.