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Finding the Fourth Proportional to 188,513.69, 260,142.30 and 103,630.14

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Solution

The fourth proportional to 188,513.69, 260,142.30 and 103,630.14 is: 143,005.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,513.69 : 260,142.30 = 103,630.14 : x
  2. Step 2: Convert to fraction form
    188,513.69/260,142.30 = 103,630.14/x
  3. Step 3: Cross multiply
    188,513.69x = 260,142.30 × 103,630.14
  4. Step 4: Simplify right side
    188,513.69x = 26,958,582,968.92
  5. Step 5: Solve for x
    x = 26,958,582,968.92/188,513.69
  6. Step 6: Final answer
    x = 143,005.97

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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.