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Finding the Fourth Proportional to 188,518.65, 260,149.16 and 103,635.11

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Solution

The fourth proportional to 188,518.65, 260,149.16 and 103,635.11 is: 143,012.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,518.65 : 260,149.16 = 103,635.11 : x
  2. Step 2: Convert to fraction form
    188,518.65/260,149.16 = 103,635.11/x
  3. Step 3: Cross multiply
    188,518.65x = 260,149.16 × 103,635.11
  4. Step 4: Simplify right side
    188,518.65x = 26,960,586,813.01
  5. Step 5: Solve for x
    x = 26,960,586,813.01/188,518.65
  6. Step 6: Final answer
    x = 143,012.84

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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.