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Finding the Fourth Proportional to 125,969.10, 188,953.65 and 113,721.90

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Solution

The fourth proportional to 125,969.10, 188,953.65 and 113,721.90 is: 170,582.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,969.10 : 188,953.65 = 113,721.90 : x
  2. Step 2: Convert to fraction form
    125,969.10/188,953.65 = 113,721.90/x
  3. Step 3: Cross multiply
    125,969.10x = 188,953.65 × 113,721.90
  4. Step 4: Simplify right side
    125,969.10x = 21,488,168,089.94
  5. Step 5: Solve for x
    x = 21,488,168,089.94/125,969.10
  6. Step 6: Final answer
    x = 170,582.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.