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Finding the Fourth Proportional to 63,344.48, 87,401.65 and 40,383

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Solution

The fourth proportional to 63,344.48, 87,401.65 and 40,383 is: 55,719.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,344.48 : 87,401.65 = 40,383 : x
  2. Step 2: Convert to fraction form
    63,344.48/87,401.65 = 40,383/x
  3. Step 3: Cross multiply
    63,344.48x = 87,401.65 × 40,383
  4. Step 4: Simplify right side
    63,344.48x = 3,529,540,831.95
  5. Step 5: Solve for x
    x = 3,529,540,831.95/63,344.48
  6. Step 6: Final answer
    x = 55,719.79

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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.