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Finding the Fourth Proportional to 72,615.80, 100,234.32 and 45,803

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Solution

The fourth proportional to 72,615.80, 100,234.32 and 45,803 is: 63,223.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,615.80 : 100,234.32 = 45,803 : x
  2. Step 2: Convert to fraction form
    72,615.80/100,234.32 = 45,803/x
  3. Step 3: Cross multiply
    72,615.80x = 100,234.32 × 45,803
  4. Step 4: Simplify right side
    72,615.80x = 4,591,032,558.96
  5. Step 5: Solve for x
    x = 4,591,032,558.96/72,615.80
  6. Step 6: Final answer
    x = 63,223.60

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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.