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Finding the Fourth Proportional to 188,513.78, 260,149.84 and 103,636.30

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Solution

The fourth proportional to 188,513.78, 260,149.84 and 103,636.30 is: 143,018.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,513.78 : 260,149.84 = 103,636.30 : x
  2. Step 2: Convert to fraction form
    188,513.78/260,149.84 = 103,636.30/x
  3. Step 3: Cross multiply
    188,513.78x = 260,149.84 × 103,636.30
  4. Step 4: Simplify right side
    188,513.78x = 26,960,966,863.19
  5. Step 5: Solve for x
    x = 26,960,966,863.19/188,513.78
  6. Step 6: Final answer
    x = 143,018.55

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1.5x scale

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.