Home / 56,619.41-78,131.79-31,129.01

Finding the Fourth Proportional to 56,619.41, 78,131.79 and 31,129.01

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Solution

The fourth proportional to 56,619.41, 78,131.79 and 31,129.01 is: 42,956.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,619.41 : 78,131.79 = 31,129.01 : x
  2. Step 2: Convert to fraction form
    56,619.41/78,131.79 = 31,129.01/x
  3. Step 3: Cross multiply
    56,619.41x = 78,131.79 × 31,129.01
  4. Step 4: Simplify right side
    56,619.41x = 2,432,165,174.56
  5. Step 5: Solve for x
    x = 2,432,165,174.56/56,619.41
  6. Step 6: Final answer
    x = 42,956.39

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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.