Home / 135,680,761.60-203,521,142.40-81,261,203.20

Finding the Fourth Proportional to 135,680,761.60, 203,521,142.40 and 81,261,203.20

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Solution

The fourth proportional to 135,680,761.60, 203,521,142.40 and 81,261,203.20 is: 121,891,804.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,680,761.60 : 203,521,142.40 = 81,261,203.20 : x
  2. Step 2: Convert to fraction form
    135,680,761.60/203,521,142.40 = 81,261,203.20/x
  3. Step 3: Cross multiply
    135,680,761.60x = 203,521,142.40 × 81,261,203.20
  4. Step 4: Simplify right side
    135,680,761.60x = 16,538,372,908,062,536
  5. Step 5: Solve for x
    x = 16,538,372,908,062,536/135,680,761.60
  6. Step 6: Final answer
    x = 121,891,804.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.