Home / 115,057.37-158,643.31-78,776.41

Finding the Fourth Proportional to 115,057.37, 158,643.31 and 78,776.41

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Solution

The fourth proportional to 115,057.37, 158,643.31 and 78,776.41 is: 108,618.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,057.37 : 158,643.31 = 78,776.41 : x
  2. Step 2: Convert to fraction form
    115,057.37/158,643.31 = 78,776.41/x
  3. Step 3: Cross multiply
    115,057.37x = 158,643.31 × 78,776.41
  4. Step 4: Simplify right side
    115,057.37x = 12,497,350,432.32
  5. Step 5: Solve for x
    x = 12,497,350,432.32/115,057.37
  6. Step 6: Final answer
    x = 108,618.43

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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.