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Finding the Fourth Proportional to 188,911.64, 260,613.72 and 127,638.06

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Solution

The fourth proportional to 188,911.64, 260,613.72 and 127,638.06 is: 176,083.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,911.64 : 260,613.72 = 127,638.06 : x
  2. Step 2: Convert to fraction form
    188,911.64/260,613.72 = 127,638.06/x
  3. Step 3: Cross multiply
    188,911.64x = 260,613.72 × 127,638.06
  4. Step 4: Simplify right side
    188,911.64x = 33,264,229,630.18
  5. Step 5: Solve for x
    x = 33,264,229,630.18/188,911.64
  6. Step 6: Final answer
    x = 176,083.54

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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.