Home / 131,839.56-181,907.10-78,115.30

Finding the Fourth Proportional to 131,839.56, 181,907.10 and 78,115.30

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Solution

The fourth proportional to 131,839.56, 181,907.10 and 78,115.30 is: 107,780.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,839.56 : 181,907.10 = 78,115.30 : x
  2. Step 2: Convert to fraction form
    131,839.56/181,907.10 = 78,115.30/x
  3. Step 3: Cross multiply
    131,839.56x = 181,907.10 × 78,115.30
  4. Step 4: Simplify right side
    131,839.56x = 14,209,727,233.86
  5. Step 5: Solve for x
    x = 14,209,727,233.86/131,839.56
  6. Step 6: Final answer
    x = 107,780.45

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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.