Home / 78,131.22-107,821.08-42,321.36

Finding the Fourth Proportional to 78,131.22, 107,821.08 and 42,321.36

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Solution

The fourth proportional to 78,131.22, 107,821.08 and 42,321.36 is: 58,403.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,131.22 : 107,821.08 = 42,321.36 : x
  2. Step 2: Convert to fraction form
    78,131.22/107,821.08 = 42,321.36/x
  3. Step 3: Cross multiply
    78,131.22x = 107,821.08 × 42,321.36
  4. Step 4: Simplify right side
    78,131.22x = 4,563,134,742.27
  5. Step 5: Solve for x
    x = 4,563,134,742.27/78,131.22
  6. Step 6: Final answer
    x = 58,403.47

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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.