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Finding the Fourth Proportional to 154,989.88, 213,831.02 and 101,305.90

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Solution

The fourth proportional to 154,989.88, 213,831.02 and 101,305.90 is: 139,766.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,989.88 : 213,831.02 = 101,305.90 : x
  2. Step 2: Convert to fraction form
    154,989.88/213,831.02 = 101,305.90/x
  3. Step 3: Cross multiply
    154,989.88x = 213,831.02 × 101,305.90
  4. Step 4: Simplify right side
    154,989.88x = 21,662,343,929.02
  5. Step 5: Solve for x
    x = 21,662,343,929.02/154,989.88
  6. Step 6: Final answer
    x = 139,766.18

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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.