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Finding the Fourth Proportional to 129,798, 179,121.78 and 70,182

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Solution

The fourth proportional to 129,798, 179,121.78 and 70,182 is: 96,851.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,798 : 179,121.78 = 70,182 : x
  2. Step 2: Convert to fraction form
    129,798/179,121.78 = 70,182/x
  3. Step 3: Cross multiply
    129,798x = 179,121.78 × 70,182
  4. Step 4: Simplify right side
    129,798x = 12,571,124,763.96
  5. Step 5: Solve for x
    x = 12,571,124,763.96/129,798
  6. Step 6: Final answer
    x = 96,851.45

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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.