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Finding the Fourth Proportional to 85,303.70, 127,965.15 and 26,138.90

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Solution

The fourth proportional to 85,303.70, 127,965.15 and 26,138.90 is: 39,211.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,303.70 : 127,965.15 = 26,138.90 : x
  2. Step 2: Convert to fraction form
    85,303.70/127,965.15 = 26,138.90/x
  3. Step 3: Cross multiply
    85,303.70x = 127,965.15 × 26,138.90
  4. Step 4: Simplify right side
    85,303.70x = 3,344,868,259.34
  5. Step 5: Solve for x
    x = 3,344,868,259.34/85,303.70
  6. Step 6: Final answer
    x = 39,211.29

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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.