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Finding the Fourth Proportional to 66,831.29, 92,218.43 and 39,963.99

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Solution

The fourth proportional to 66,831.29, 92,218.43 and 39,963.99 is: 55,145.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,831.29 : 92,218.43 = 39,963.99 : x
  2. Step 2: Convert to fraction form
    66,831.29/92,218.43 = 39,963.99/x
  3. Step 3: Cross multiply
    66,831.29x = 92,218.43 × 39,963.99
  4. Step 4: Simplify right side
    66,831.29x = 3,685,416,414.34
  5. Step 5: Solve for x
    x = 3,685,416,414.34/66,831.29
  6. Step 6: Final answer
    x = 55,145.07

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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.