Home / 138,198.34-190,699.86-77,767.48

Finding the Fourth Proportional to 138,198.34, 190,699.86 and 77,767.48

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Solution

The fourth proportional to 138,198.34, 190,699.86 and 77,767.48 is: 107,311.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,198.34 : 190,699.86 = 77,767.48 : x
  2. Step 2: Convert to fraction form
    138,198.34/190,699.86 = 77,767.48/x
  3. Step 3: Cross multiply
    138,198.34x = 190,699.86 × 77,767.48
  4. Step 4: Simplify right side
    138,198.34x = 14,830,247,548.55
  5. Step 5: Solve for x
    x = 14,830,247,548.55/138,198.34
  6. Step 6: Final answer
    x = 107,311.33

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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.