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Finding the Fourth Proportional to 255,079.80, 382,619.70 and 143,105.40

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Solution

The fourth proportional to 255,079.80, 382,619.70 and 143,105.40 is: 214,658.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,079.80 : 382,619.70 = 143,105.40 : x
  2. Step 2: Convert to fraction form
    255,079.80/382,619.70 = 143,105.40/x
  3. Step 3: Cross multiply
    255,079.80x = 382,619.70 × 143,105.40
  4. Step 4: Simplify right side
    255,079.80x = 54,754,945,216.38
  5. Step 5: Solve for x
    x = 54,754,945,216.38/255,079.80
  6. Step 6: Final answer
    x = 214,658.10

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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.