Home / 78,825.15-108,776.66-43,015.59

Finding the Fourth Proportional to 78,825.15, 108,776.66 and 43,015.59

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Solution

The fourth proportional to 78,825.15, 108,776.66 and 43,015.59 is: 59,360.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,825.15 : 108,776.66 = 43,015.59 : x
  2. Step 2: Convert to fraction form
    78,825.15/108,776.66 = 43,015.59/x
  3. Step 3: Cross multiply
    78,825.15x = 108,776.66 × 43,015.59
  4. Step 4: Simplify right side
    78,825.15x = 4,679,091,993.05
  5. Step 5: Solve for x
    x = 4,679,091,993.05/78,825.15
  6. Step 6: Final answer
    x = 59,360.39

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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.