Home / 78,989.24-109,007.80-43,178.48

Finding the Fourth Proportional to 78,989.24, 109,007.80 and 43,178.48

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Solution

The fourth proportional to 78,989.24, 109,007.80 and 43,178.48 is: 59,587.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,989.24 : 109,007.80 = 43,178.48 : x
  2. Step 2: Convert to fraction form
    78,989.24/109,007.80 = 43,178.48/x
  3. Step 3: Cross multiply
    78,989.24x = 109,007.80 × 43,178.48
  4. Step 4: Simplify right side
    78,989.24x = 4,706,791,112.14
  5. Step 5: Solve for x
    x = 4,706,791,112.14/78,989.24
  6. Step 6: Final answer
    x = 59,587.75

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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.