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Finding the Fourth Proportional to 269,931.99, 405,143.55 and 143,678.37

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Solution

The fourth proportional to 269,931.99, 405,143.55 and 143,678.37 is: 215,648.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,931.99 : 405,143.55 = 143,678.37 : x
  2. Step 2: Convert to fraction form
    269,931.99/405,143.55 = 143,678.37/x
  3. Step 3: Cross multiply
    269,931.99x = 405,143.55 × 143,678.37
  4. Step 4: Simplify right side
    269,931.99x = 58,210,364,880.01
  5. Step 5: Solve for x
    x = 58,210,364,880.01/269,931.99
  6. Step 6: Final answer
    x = 215,648.26

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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.