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Finding the Fourth Proportional to 129,634, 178,895.04 and 70,018

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Solution

The fourth proportional to 129,634, 178,895.04 and 70,018 is: 96,624.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,634 : 178,895.04 = 70,018 : x
  2. Step 2: Convert to fraction form
    129,634/178,895.04 = 70,018/x
  3. Step 3: Cross multiply
    129,634x = 178,895.04 × 70,018
  4. Step 4: Simplify right side
    129,634x = 12,525,872,910.72
  5. Step 5: Solve for x
    x = 12,525,872,910.72/129,634
  6. Step 6: Final answer
    x = 96,624.90

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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.