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Finding the Fourth Proportional to 86,081.31, 118,791.81 and 47,840.67

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Solution

The fourth proportional to 86,081.31, 118,791.81 and 47,840.67 is: 66,019.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,081.31 : 118,791.81 = 47,840.67 : x
  2. Step 2: Convert to fraction form
    86,081.31/118,791.81 = 47,840.67/x
  3. Step 3: Cross multiply
    86,081.31x = 118,791.81 × 47,840.67
  4. Step 4: Simplify right side
    86,081.31x = 5,683,079,780.91
  5. Step 5: Solve for x
    x = 5,683,079,780.91/86,081.31
  6. Step 6: Final answer
    x = 66,019.90

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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.