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Finding the Fourth Proportional to 86,742.79, 119,709.63 and 52,745.65

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Solution

The fourth proportional to 86,742.79, 119,709.63 and 52,745.65 is: 72,791.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,742.79 : 119,709.63 = 52,745.65 : x
  2. Step 2: Convert to fraction form
    86,742.79/119,709.63 = 52,745.65/x
  3. Step 3: Cross multiply
    86,742.79x = 119,709.63 × 52,745.65
  4. Step 4: Simplify right side
    86,742.79x = 6,314,162,245.61
  5. Step 5: Solve for x
    x = 6,314,162,245.61/86,742.79
  6. Step 6: Final answer
    x = 72,791.78

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1.5x scale

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.