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Finding the Fourth Proportional to 72,812.88, 100,512.78 and 48,953.40

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Solution

The fourth proportional to 72,812.88, 100,512.78 and 48,953.40 is: 67,576.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,812.88 : 100,512.78 = 48,953.40 : x
  2. Step 2: Convert to fraction form
    72,812.88/100,512.78 = 48,953.40/x
  3. Step 3: Cross multiply
    72,812.88x = 100,512.78 × 48,953.40
  4. Step 4: Simplify right side
    72,812.88x = 4,920,442,324.45
  5. Step 5: Solve for x
    x = 4,920,442,324.45/72,812.88
  6. Step 6: Final answer
    x = 67,576.54

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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.