Home / 129,611.56-193,955.40-89,638.66

Finding the Fourth Proportional to 129,611.56, 193,955.40 and 89,638.66

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Solution

The fourth proportional to 129,611.56, 193,955.40 and 89,638.66 is: 134,138.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,611.56 : 193,955.40 = 89,638.66 : x
  2. Step 2: Convert to fraction form
    129,611.56/193,955.40 = 89,638.66/x
  3. Step 3: Cross multiply
    129,611.56x = 193,955.40 × 89,638.66
  4. Step 4: Simplify right side
    129,611.56x = 17,385,902,155.76
  5. Step 5: Solve for x
    x = 17,385,902,155.76/129,611.56
  6. Step 6: Final answer
    x = 134,138.51

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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.