Home / 78,621.89-117,941.13-45,341.21

Finding the Fourth Proportional to 78,621.89, 117,941.13 and 45,341.21

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Solution

The fourth proportional to 78,621.89, 117,941.13 and 45,341.21 is: 68,016.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,621.89 : 117,941.13 = 45,341.21 : x
  2. Step 2: Convert to fraction form
    78,621.89/117,941.13 = 45,341.21/x
  3. Step 3: Cross multiply
    78,621.89x = 117,941.13 × 45,341.21
  4. Step 4: Simplify right side
    78,621.89x = 5,347,593,837.82
  5. Step 5: Solve for x
    x = 5,347,593,837.82/78,621.89
  6. Step 6: Final answer
    x = 68,016.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.