Home / 107,803.23-161,507.80-78,147.51

Finding the Fourth Proportional to 107,803.23, 161,507.80 and 78,147.51

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Solution

The fourth proportional to 107,803.23, 161,507.80 and 78,147.51 is: 117,078.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,803.23 : 161,507.80 = 78,147.51 : x
  2. Step 2: Convert to fraction form
    107,803.23/161,507.80 = 78,147.51/x
  3. Step 3: Cross multiply
    107,803.23x = 161,507.80 × 78,147.51
  4. Step 4: Simplify right side
    107,803.23x = 12,621,432,415.58
  5. Step 5: Solve for x
    x = 12,621,432,415.58/107,803.23
  6. Step 6: Final answer
    x = 117,078.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.