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Finding the Fourth Proportional to 86,043, 118,687.86 and 54,156.54

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Solution

The fourth proportional to 86,043, 118,687.86 and 54,156.54 is: 74,703.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,043 : 118,687.86 = 54,156.54 : x
  2. Step 2: Convert to fraction form
    86,043/118,687.86 = 54,156.54/x
  3. Step 3: Cross multiply
    86,043x = 118,687.86 × 54,156.54
  4. Step 4: Simplify right side
    86,043x = 6,427,723,837.60
  5. Step 5: Solve for x
    x = 6,427,723,837.60/86,043
  6. Step 6: Final answer
    x = 74,703.62

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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.