Home / 120,732.86-166,724.80-77,787.74

Finding the Fourth Proportional to 120,732.86, 166,724.80 and 77,787.74

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Solution

The fourth proportional to 120,732.86, 166,724.80 and 77,787.74 is: 107,420.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,732.86 : 166,724.80 = 77,787.74 : x
  2. Step 2: Convert to fraction form
    120,732.86/166,724.80 = 77,787.74/x
  3. Step 3: Cross multiply
    120,732.86x = 166,724.80 × 77,787.74
  4. Step 4: Simplify right side
    120,732.86x = 12,969,145,393.95
  5. Step 5: Solve for x
    x = 12,969,145,393.95/120,732.86
  6. Step 6: Final answer
    x = 107,420.18

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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.