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Finding the Fourth Proportional to 136,987.88, 188,991.18 and 101,263.64

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Solution

The fourth proportional to 136,987.88, 188,991.18 and 101,263.64 is: 139,705.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,987.88 : 188,991.18 = 101,263.64 : x
  2. Step 2: Convert to fraction form
    136,987.88/188,991.18 = 101,263.64/x
  3. Step 3: Cross multiply
    136,987.88x = 188,991.18 × 101,263.64
  4. Step 4: Simplify right side
    136,987.88x = 19,137,934,814.70
  5. Step 5: Solve for x
    x = 19,137,934,814.70/136,987.88
  6. Step 6: Final answer
    x = 139,705.31

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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.