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Finding the Fourth Proportional to 129,608, 178,859.04 and 69,992

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Solution

The fourth proportional to 129,608, 178,859.04 and 69,992 is: 96,588.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,608 : 178,859.04 = 69,992 : x
  2. Step 2: Convert to fraction form
    129,608/178,859.04 = 69,992/x
  3. Step 3: Cross multiply
    129,608x = 178,859.04 × 69,992
  4. Step 4: Simplify right side
    129,608x = 12,518,701,927.68
  5. Step 5: Solve for x
    x = 12,518,701,927.68/129,608
  6. Step 6: Final answer
    x = 96,588.96

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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.