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Finding the Fourth Proportional to 129,706.56, 178,995.24 and 70,090.56

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Solution

The fourth proportional to 129,706.56, 178,995.24 and 70,090.56 is: 96,725.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,706.56 : 178,995.24 = 70,090.56 : x
  2. Step 2: Convert to fraction form
    129,706.56/178,995.24 = 70,090.56/x
  3. Step 3: Cross multiply
    129,706.56x = 178,995.24 × 70,090.56
  4. Step 4: Simplify right side
    129,706.56x = 12,545,876,608.93
  5. Step 5: Solve for x
    x = 12,545,876,608.93/129,706.56
  6. Step 6: Final answer
    x = 96,725.07

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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.