Home / 56,615.12-78,129.83-31,122.56

Finding the Fourth Proportional to 56,615.12, 78,129.83 and 31,122.56

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Solution

The fourth proportional to 56,615.12, 78,129.83 and 31,122.56 is: 42,949.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,615.12 : 78,129.83 = 31,122.56 : x
  2. Step 2: Convert to fraction form
    56,615.12/78,129.83 = 31,122.56/x
  3. Step 3: Cross multiply
    56,615.12x = 78,129.83 × 31,122.56
  4. Step 4: Simplify right side
    56,615.12x = 2,431,600,009.12
  5. Step 5: Solve for x
    x = 2,431,600,009.12/56,615.12
  6. Step 6: Final answer
    x = 42,949.66

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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.