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Finding the Fourth Proportional to 136,986.88, 188,989.80 and 101,262.64

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Solution

The fourth proportional to 136,986.88, 188,989.80 and 101,262.64 is: 139,703.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,986.88 : 188,989.80 = 101,262.64 : x
  2. Step 2: Convert to fraction form
    136,986.88/188,989.80 = 101,262.64/x
  3. Step 3: Cross multiply
    136,986.88x = 188,989.80 × 101,262.64
  4. Step 4: Simplify right side
    136,986.88x = 19,137,606,081.07
  5. Step 5: Solve for x
    x = 19,137,606,081.07/136,986.88
  6. Step 6: Final answer
    x = 139,703.93

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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.