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Finding the Fourth Proportional to 125,881.40, 188,649.30 and 102,553.40

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Solution

The fourth proportional to 125,881.40, 188,649.30 and 102,553.40 is: 153,689.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,881.40 : 188,649.30 = 102,553.40 : x
  2. Step 2: Convert to fraction form
    125,881.40/188,649.30 = 102,553.40/x
  3. Step 3: Cross multiply
    125,881.40x = 188,649.30 × 102,553.40
  4. Step 4: Simplify right side
    125,881.40x = 19,346,627,122.62
  5. Step 5: Solve for x
    x = 19,346,627,122.62/125,881.40
  6. Step 6: Final answer
    x = 153,689.32

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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.