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Finding the Fourth Proportional to 136,795.98, 188,781.65 and 85,810.88

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Solution

The fourth proportional to 136,795.98, 188,781.65 and 85,810.88 is: 118,421.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,795.98 : 188,781.65 = 85,810.88 : x
  2. Step 2: Convert to fraction form
    136,795.98/188,781.65 = 85,810.88/x
  3. Step 3: Cross multiply
    136,795.98x = 188,781.65 × 85,810.88
  4. Step 4: Simplify right side
    136,795.98x = 16,199,519,514.35
  5. Step 5: Solve for x
    x = 16,199,519,514.35/136,795.98
  6. Step 6: Final answer
    x = 118,421.02

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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.