Home / 78,014.64-107,660.07-42,204.54

Finding the Fourth Proportional to 78,014.64, 107,660.07 and 42,204.54

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Solution

The fourth proportional to 78,014.64, 107,660.07 and 42,204.54 is: 58,242.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,014.64 : 107,660.07 = 42,204.54 : x
  2. Step 2: Convert to fraction form
    78,014.64/107,660.07 = 42,204.54/x
  3. Step 3: Cross multiply
    78,014.64x = 107,660.07 × 42,204.54
  4. Step 4: Simplify right side
    78,014.64x = 4,543,743,730.72
  5. Step 5: Solve for x
    x = 4,543,743,730.72/78,014.64
  6. Step 6: Final answer
    x = 58,242.19

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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.