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Finding the Fourth Proportional to 143,219.78, 214,828.31 and 87,075.39

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Solution

The fourth proportional to 143,219.78, 214,828.31 and 87,075.39 is: 130,612.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,219.78 : 214,828.31 = 87,075.39 : x
  2. Step 2: Convert to fraction form
    143,219.78/214,828.31 = 87,075.39/x
  3. Step 3: Cross multiply
    143,219.78x = 214,828.31 × 87,075.39
  4. Step 4: Simplify right side
    143,219.78x = 18,706,258,440.91
  5. Step 5: Solve for x
    x = 18,706,258,440.91/143,219.78
  6. Step 6: Final answer
    x = 130,612.26

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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.