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Finding the Fourth Proportional to 86,856.75, 119,862.32 and 47,112.75

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Solution

The fourth proportional to 86,856.75, 119,862.32 and 47,112.75 is: 65,015.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,856.75 : 119,862.32 = 47,112.75 : x
  2. Step 2: Convert to fraction form
    86,856.75/119,862.32 = 47,112.75/x
  3. Step 3: Cross multiply
    86,856.75x = 119,862.32 × 47,112.75
  4. Step 4: Simplify right side
    86,856.75x = 5,647,043,281.02
  5. Step 5: Solve for x
    x = 5,647,043,281.02/86,856.75
  6. Step 6: Final answer
    x = 65,015.60

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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.