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Finding the Fourth Proportional to 188,902.72, 260,696.64 and 104,021.20

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Solution

The fourth proportional to 188,902.72, 260,696.64 and 104,021.20 is: 143,555.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,902.72 : 260,696.64 = 104,021.20 : x
  2. Step 2: Convert to fraction form
    188,902.72/260,696.64 = 104,021.20/x
  3. Step 3: Cross multiply
    188,902.72x = 260,696.64 × 104,021.20
  4. Step 4: Simplify right side
    188,902.72x = 27,117,977,328.77
  5. Step 5: Solve for x
    x = 27,117,977,328.77/188,902.72
  6. Step 6: Final answer
    x = 143,555.25

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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.