Home / 280,795.41-421,131.02-81,072.45

Finding the Fourth Proportional to 280,795.41, 421,131.02 and 81,072.45

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Solution

The fourth proportional to 280,795.41, 421,131.02 and 81,072.45 is: 121,590.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,795.41 : 421,131.02 = 81,072.45 : x
  2. Step 2: Convert to fraction form
    280,795.41/421,131.02 = 81,072.45/x
  3. Step 3: Cross multiply
    280,795.41x = 421,131.02 × 81,072.45
  4. Step 4: Simplify right side
    280,795.41x = 34,142,123,157.04
  5. Step 5: Solve for x
    x = 34,142,123,157.04/280,795.41
  6. Step 6: Final answer
    x = 121,590.75

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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.