Home / 78,015.36-107,660.76-42,205.26

Finding the Fourth Proportional to 78,015.36, 107,660.76 and 42,205.26

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Solution

The fourth proportional to 78,015.36, 107,660.76 and 42,205.26 is: 58,243.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,015.36 : 107,660.76 = 42,205.26 : x
  2. Step 2: Convert to fraction form
    78,015.36/107,660.76 = 42,205.26/x
  3. Step 3: Cross multiply
    78,015.36x = 107,660.76 × 42,205.26
  4. Step 4: Simplify right side
    78,015.36x = 4,543,850,367.60
  5. Step 5: Solve for x
    x = 4,543,850,367.60/78,015.36
  6. Step 6: Final answer
    x = 58,243.02

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1.5x scale

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.