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Finding the Fourth Proportional to 188,858.10, 260,638.90 and 103,990.34

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Solution

The fourth proportional to 188,858.10, 260,638.90 and 103,990.34 is: 143,514.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,858.10 : 260,638.90 = 103,990.34 : x
  2. Step 2: Convert to fraction form
    188,858.10/260,638.90 = 103,990.34/x
  3. Step 3: Cross multiply
    188,858.10x = 260,638.90 × 103,990.34
  4. Step 4: Simplify right side
    188,858.10x = 27,103,927,828.23
  5. Step 5: Solve for x
    x = 27,103,927,828.23/188,858.10
  6. Step 6: Final answer
    x = 143,514.78

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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.