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Finding the Fourth Proportional to 136,782.15, 188,844.71 and 88,409.40

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Solution

The fourth proportional to 136,782.15, 188,844.71 and 88,409.40 is: 122,060.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,782.15 : 188,844.71 = 88,409.40 : x
  2. Step 2: Convert to fraction form
    136,782.15/188,844.71 = 88,409.40/x
  3. Step 3: Cross multiply
    136,782.15x = 188,844.71 × 88,409.40
  4. Step 4: Simplify right side
    136,782.15x = 16,695,647,062.23
  5. Step 5: Solve for x
    x = 16,695,647,062.23/136,782.15
  6. Step 6: Final answer
    x = 122,060.13

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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.