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Finding the Fourth Proportional to 72,671.42, 100,221.88 and 47,153.43

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Solution

The fourth proportional to 72,671.42, 100,221.88 and 47,153.43 is: 65,029.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,671.42 : 100,221.88 = 47,153.43 : x
  2. Step 2: Convert to fraction form
    72,671.42/100,221.88 = 47,153.43/x
  3. Step 3: Cross multiply
    72,671.42x = 100,221.88 × 47,153.43
  4. Step 4: Simplify right side
    72,671.42x = 4,725,805,285.16
  5. Step 5: Solve for x
    x = 4,725,805,285.16/72,671.42
  6. Step 6: Final answer
    x = 65,029.76

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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.