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Finding the Fourth Proportional to 312,388.66, 468,601.16 and 87,766.60

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Solution

The fourth proportional to 312,388.66, 468,601.16 and 87,766.60 is: 131,655.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,388.66 : 468,601.16 = 87,766.60 : x
  2. Step 2: Convert to fraction form
    312,388.66/468,601.16 = 87,766.60/x
  3. Step 3: Cross multiply
    312,388.66x = 468,601.16 × 87,766.60
  4. Step 4: Simplify right side
    312,388.66x = 41,127,530,569.26
  5. Step 5: Solve for x
    x = 41,127,530,569.26/312,388.66
  6. Step 6: Final answer
    x = 131,655.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.