Home / 107,928.90-161,720.55-68,415.30

Finding the Fourth Proportional to 107,928.90, 161,720.55 and 68,415.30

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Solution

The fourth proportional to 107,928.90, 161,720.55 and 68,415.30 is: 102,513.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,928.90 : 161,720.55 = 68,415.30 : x
  2. Step 2: Convert to fraction form
    107,928.90/161,720.55 = 68,415.30/x
  3. Step 3: Cross multiply
    107,928.90x = 161,720.55 × 68,415.30
  4. Step 4: Simplify right side
    107,928.90x = 11,064,159,944.42
  5. Step 5: Solve for x
    x = 11,064,159,944.42/107,928.90
  6. Step 6: Final answer
    x = 102,513.41

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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.