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Finding the Fourth Proportional to 86,123.54, 118,850.36 and 47,881.87

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Solution

The fourth proportional to 86,123.54, 118,850.36 and 47,881.87 is: 66,076.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,123.54 : 118,850.36 = 47,881.87 : x
  2. Step 2: Convert to fraction form
    86,123.54/118,850.36 = 47,881.87/x
  3. Step 3: Cross multiply
    86,123.54x = 118,850.36 × 47,881.87
  4. Step 4: Simplify right side
    86,123.54x = 5,690,776,653.31
  5. Step 5: Solve for x
    x = 5,690,776,653.31/86,123.54
  6. Step 6: Final answer
    x = 66,076.91

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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.