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Finding the Fourth Proportional to 125,907.90, 188,424.45 and 115,410.30

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Solution

The fourth proportional to 125,907.90, 188,424.45 and 115,410.30 is: 172,714.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,907.90 : 188,424.45 = 115,410.30 : x
  2. Step 2: Convert to fraction form
    125,907.90/188,424.45 = 115,410.30/x
  3. Step 3: Cross multiply
    125,907.90x = 188,424.45 × 115,410.30
  4. Step 4: Simplify right side
    125,907.90x = 21,746,122,301.84
  5. Step 5: Solve for x
    x = 21,746,122,301.84/125,907.90
  6. Step 6: Final answer
    x = 172,714.52

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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.