Home / 378,828.85-568,075.87-142,005.40

Finding the Fourth Proportional to 378,828.85, 568,075.87 and 142,005.40

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Solution

The fourth proportional to 378,828.85, 568,075.87 and 142,005.40 is: 212,945.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,828.85 : 568,075.87 = 142,005.40 : x
  2. Step 2: Convert to fraction form
    378,828.85/568,075.87 = 142,005.40/x
  3. Step 3: Cross multiply
    378,828.85x = 568,075.87 × 142,005.40
  4. Step 4: Simplify right side
    378,828.85x = 80,669,837,954.31
  5. Step 5: Solve for x
    x = 80,669,837,954.31/378,828.85
  6. Step 6: Final answer
    x = 212,945.34

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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.