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Finding the Fourth Proportional to 81,586.64, 112,560.96 and 51,374.60

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Solution

The fourth proportional to 81,586.64, 112,560.96 and 51,374.60 is: 70,878.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,586.64 : 112,560.96 = 51,374.60 : x
  2. Step 2: Convert to fraction form
    81,586.64/112,560.96 = 51,374.60/x
  3. Step 3: Cross multiply
    81,586.64x = 112,560.96 × 51,374.60
  4. Step 4: Simplify right side
    81,586.64x = 5,782,774,295.62
  5. Step 5: Solve for x
    x = 5,782,774,295.62/81,586.64
  6. Step 6: Final answer
    x = 70,878.94

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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.