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Finding the Fourth Proportional to 99,090.22, 136,858.05 and 65,249.98

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Solution

The fourth proportional to 99,090.22, 136,858.05 and 65,249.98 is: 90,119.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,090.22 : 136,858.05 = 65,249.98 : x
  2. Step 2: Convert to fraction form
    99,090.22/136,858.05 = 65,249.98/x
  3. Step 3: Cross multiply
    99,090.22x = 136,858.05 × 65,249.98
  4. Step 4: Simplify right side
    99,090.22x = 8,929,985,025.34
  5. Step 5: Solve for x
    x = 8,929,985,025.34/99,090.22
  6. Step 6: Final answer
    x = 90,119.74

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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.