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Finding the Fourth Proportional to 129,651, 178,918.38 and 70,035

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Solution

The fourth proportional to 129,651, 178,918.38 and 70,035 is: 96,648.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,651 : 178,918.38 = 70,035 : x
  2. Step 2: Convert to fraction form
    129,651/178,918.38 = 70,035/x
  3. Step 3: Cross multiply
    129,651x = 178,918.38 × 70,035
  4. Step 4: Simplify right side
    129,651x = 12,530,548,743.30
  5. Step 5: Solve for x
    x = 12,530,548,743.30/129,651
  6. Step 6: Final answer
    x = 96,648.30

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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.