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Finding the Fourth Proportional to 95,640.21, 143,398.78 and 45,719.19

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Solution

The fourth proportional to 95,640.21, 143,398.78 and 45,719.19 is: 68,549.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    95,640.21 : 143,398.78 = 45,719.19 : x
  2. Step 2: Convert to fraction form
    95,640.21/143,398.78 = 45,719.19/x
  3. Step 3: Cross multiply
    95,640.21x = 143,398.78 × 45,719.19
  4. Step 4: Simplify right side
    95,640.21x = 6,556,075,954.29
  5. Step 5: Solve for x
    x = 6,556,075,954.29/95,640.21
  6. Step 6: Final answer
    x = 68,549.37

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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.