Home / 121,438.24-167,636.59-76,142.03

Finding the Fourth Proportional to 121,438.24, 167,636.59 and 76,142.03

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Solution

The fourth proportional to 121,438.24, 167,636.59 and 76,142.03 is: 105,108.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,438.24 : 167,636.59 = 76,142.03 : x
  2. Step 2: Convert to fraction form
    121,438.24/167,636.59 = 76,142.03/x
  3. Step 3: Cross multiply
    121,438.24x = 167,636.59 × 76,142.03
  4. Step 4: Simplify right side
    121,438.24x = 12,764,189,236.34
  5. Step 5: Solve for x
    x = 12,764,189,236.34/121,438.24
  6. Step 6: Final answer
    x = 105,108.49

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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.