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Finding the Fourth Proportional to 136,718.40, 205,106.40 and 43,233.60

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Solution

The fourth proportional to 136,718.40, 205,106.40 and 43,233.60 is: 64,859.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,718.40 : 205,106.40 = 43,233.60 : x
  2. Step 2: Convert to fraction form
    136,718.40/205,106.40 = 43,233.60/x
  3. Step 3: Cross multiply
    136,718.40x = 205,106.40 × 43,233.60
  4. Step 4: Simplify right side
    136,718.40x = 8,867,488,055.04
  5. Step 5: Solve for x
    x = 8,867,488,055.04/136,718.40
  6. Step 6: Final answer
    x = 64,859.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.