Home / 142,778.80-213,979.20-76,075.30

Finding the Fourth Proportional to 142,778.80, 213,979.20 and 76,075.30

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Solution

The fourth proportional to 142,778.80, 213,979.20 and 76,075.30 is: 114,012.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,778.80 : 213,979.20 = 76,075.30 : x
  2. Step 2: Convert to fraction form
    142,778.80/213,979.20 = 76,075.30/x
  3. Step 3: Cross multiply
    142,778.80x = 213,979.20 × 76,075.30
  4. Step 4: Simplify right side
    142,778.80x = 16,278,531,833.76
  5. Step 5: Solve for x
    x = 16,278,531,833.76/142,778.80
  6. Step 6: Final answer
    x = 114,012.25

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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.