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Finding the Fourth Proportional to 125,626.40, 188,128.56 and 70,105.76

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Solution

The fourth proportional to 125,626.40, 188,128.56 and 70,105.76 is: 104,985.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,626.40 : 188,128.56 = 70,105.76 : x
  2. Step 2: Convert to fraction form
    125,626.40/188,128.56 = 70,105.76/x
  3. Step 3: Cross multiply
    125,626.40x = 188,128.56 × 70,105.76
  4. Step 4: Simplify right side
    125,626.40x = 13,188,895,676.51
  5. Step 5: Solve for x
    x = 13,188,895,676.51/125,626.40
  6. Step 6: Final answer
    x = 104,985.06

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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.