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Finding the Fourth Proportional to 72,615.48, 100,203.75 and 40,778.22

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Solution

The fourth proportional to 72,615.48, 100,203.75 and 40,778.22 is: 56,270.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,615.48 : 100,203.75 = 40,778.22 : x
  2. Step 2: Convert to fraction form
    72,615.48/100,203.75 = 40,778.22/x
  3. Step 3: Cross multiply
    72,615.48x = 100,203.75 × 40,778.22
  4. Step 4: Simplify right side
    72,615.48x = 4,086,130,562.33
  5. Step 5: Solve for x
    x = 4,086,130,562.33/72,615.48
  6. Step 6: Final answer
    x = 56,270.79

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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.