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Finding the Fourth Proportional to 312,558.73, 468,865.71 and 87,921.02

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Solution

The fourth proportional to 312,558.73, 468,865.71 and 87,921.02 is: 131,889.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,558.73 : 468,865.71 = 87,921.02 : x
  2. Step 2: Convert to fraction form
    312,558.73/468,865.71 = 87,921.02/x
  3. Step 3: Cross multiply
    312,558.73x = 468,865.71 × 87,921.02
  4. Step 4: Simplify right side
    312,558.73x = 41,223,152,638.39
  5. Step 5: Solve for x
    x = 41,223,152,638.39/312,558.73
  6. Step 6: Final answer
    x = 131,889.30

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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.