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Finding the Fourth Proportional to 188,873.89, 260,638.06 and 103,985.49

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Solution

The fourth proportional to 188,873.89, 260,638.06 and 103,985.49 is: 143,495.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,873.89 : 260,638.06 = 103,985.49 : x
  2. Step 2: Convert to fraction form
    188,873.89/260,638.06 = 103,985.49/x
  3. Step 3: Cross multiply
    188,873.89x = 260,638.06 × 103,985.49
  4. Step 4: Simplify right side
    188,873.89x = 27,102,576,381.75
  5. Step 5: Solve for x
    x = 27,102,576,381.75/188,873.89
  6. Step 6: Final answer
    x = 143,495.62

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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.