Home / 131,840.44-181,908.31-78,116.17

Finding the Fourth Proportional to 131,840.44, 181,908.31 and 78,116.17

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Solution

The fourth proportional to 131,840.44, 181,908.31 and 78,116.17 is: 107,781.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,840.44 : 181,908.31 = 78,116.17 : x
  2. Step 2: Convert to fraction form
    131,840.44/181,908.31 = 78,116.17/x
  3. Step 3: Cross multiply
    131,840.44x = 181,908.31 × 78,116.17
  4. Step 4: Simplify right side
    131,840.44x = 14,209,980,468.37
  5. Step 5: Solve for x
    x = 14,209,980,468.37/131,840.44
  6. Step 6: Final answer
    x = 107,781.65

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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.