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Finding the Fourth Proportional to 188,423.79, 260,021.82 and 103,539.03

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Solution

The fourth proportional to 188,423.79, 260,021.82 and 103,539.03 is: 142,882.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,423.79 : 260,021.82 = 103,539.03 : x
  2. Step 2: Convert to fraction form
    188,423.79/260,021.82 = 103,539.03/x
  3. Step 3: Cross multiply
    188,423.79x = 260,021.82 × 103,539.03
  4. Step 4: Simplify right side
    188,423.79x = 26,922,407,021.63
  5. Step 5: Solve for x
    x = 26,922,407,021.63/188,423.79
  6. Step 6: Final answer
    x = 142,882.21

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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.