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Finding the Fourth Proportional to 124,515.75, 171,831.74 and 79,803.75

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Solution

The fourth proportional to 124,515.75, 171,831.74 and 79,803.75 is: 110,129.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,515.75 : 171,831.74 = 79,803.75 : x
  2. Step 2: Convert to fraction form
    124,515.75/171,831.74 = 79,803.75/x
  3. Step 3: Cross multiply
    124,515.75x = 171,831.74 × 79,803.75
  4. Step 4: Simplify right side
    124,515.75x = 13,712,816,822.01
  5. Step 5: Solve for x
    x = 13,712,816,822.01/124,515.75
  6. Step 6: Final answer
    x = 110,129.18

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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.