Home / 121,611.30-167,775.35-81,261.15

Finding the Fourth Proportional to 121,611.30, 167,775.35 and 81,261.15

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Solution

The fourth proportional to 121,611.30, 167,775.35 and 81,261.15 is: 112,108.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,611.30 : 167,775.35 = 81,261.15 : x
  2. Step 2: Convert to fraction form
    121,611.30/167,775.35 = 81,261.15/x
  3. Step 3: Cross multiply
    121,611.30x = 167,775.35 × 81,261.15
  4. Step 4: Simplify right side
    121,611.30x = 13,633,617,476.35
  5. Step 5: Solve for x
    x = 13,633,617,476.35/121,611.30
  6. Step 6: Final answer
    x = 112,108.15

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1.5x scale

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.