Home / 279,821.10-419,731.65-90,281.10

Finding the Fourth Proportional to 279,821.10, 419,731.65 and 90,281.10

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Solution

The fourth proportional to 279,821.10, 419,731.65 and 90,281.10 is: 135,421.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,821.10 : 419,731.65 = 90,281.10 : x
  2. Step 2: Convert to fraction form
    279,821.10/419,731.65 = 90,281.10/x
  3. Step 3: Cross multiply
    279,821.10x = 419,731.65 × 90,281.10
  4. Step 4: Simplify right side
    279,821.10x = 37,893,835,066.82
  5. Step 5: Solve for x
    x = 37,893,835,066.82/279,821.10
  6. Step 6: Final answer
    x = 135,421.65

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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.