Home / 281,621.10-422,428.01-68,390.76

Finding the Fourth Proportional to 281,621.10, 422,428.01 and 68,390.76

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Solution

The fourth proportional to 281,621.10, 422,428.01 and 68,390.76 is: 102,585.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,621.10 : 422,428.01 = 68,390.76 : x
  2. Step 2: Convert to fraction form
    281,621.10/422,428.01 = 68,390.76/x
  3. Step 3: Cross multiply
    281,621.10x = 422,428.01 × 68,390.76
  4. Step 4: Simplify right side
    281,621.10x = 28,890,172,307.23
  5. Step 5: Solve for x
    x = 28,890,172,307.23/281,621.10
  6. Step 6: Final answer
    x = 102,585.25

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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.