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Finding the Fourth Proportional to 125,978.05, 188,045.29 and 111,031.66

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Solution

The fourth proportional to 125,978.05, 188,045.29 and 111,031.66 is: 165,735.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,978.05 : 188,045.29 = 111,031.66 : x
  2. Step 2: Convert to fraction form
    125,978.05/188,045.29 = 111,031.66/x
  3. Step 3: Cross multiply
    125,978.05x = 188,045.29 × 111,031.66
  4. Step 4: Simplify right side
    125,978.05x = 20,878,980,703.88
  5. Step 5: Solve for x
    x = 20,878,980,703.88/125,978.05
  6. Step 6: Final answer
    x = 165,735.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.