Home / 121,630.45-167,849.01-66,439.82

Finding the Fourth Proportional to 121,630.45, 167,849.01 and 66,439.82

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Solution

The fourth proportional to 121,630.45, 167,849.01 and 66,439.82 is: 91,686.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,630.45 : 167,849.01 = 66,439.82 : x
  2. Step 2: Convert to fraction form
    121,630.45/167,849.01 = 66,439.82/x
  3. Step 3: Cross multiply
    121,630.45x = 167,849.01 × 66,439.82
  4. Step 4: Simplify right side
    121,630.45x = 11,151,857,421.48
  5. Step 5: Solve for x
    x = 11,151,857,421.48/121,630.45
  6. Step 6: Final answer
    x = 91,686.40

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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.