Home / 138,200.82-190,714.88-77,771.43

Finding the Fourth Proportional to 138,200.82, 190,714.88 and 77,771.43

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Solution

The fourth proportional to 138,200.82, 190,714.88 and 77,771.43 is: 107,323.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,200.82 : 190,714.88 = 77,771.43 : x
  2. Step 2: Convert to fraction form
    138,200.82/190,714.88 = 77,771.43/x
  3. Step 3: Cross multiply
    138,200.82x = 190,714.88 × 77,771.43
  4. Step 4: Simplify right side
    138,200.82x = 14,832,168,551.02
  5. Step 5: Solve for x
    x = 14,832,168,551.02/138,200.82
  6. Step 6: Final answer
    x = 107,323.30

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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.