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Finding the Fourth Proportional to 279,881.12, 419,881.32 and 90,352.26

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Solution

The fourth proportional to 279,881.12, 419,881.32 and 90,352.26 is: 135,547.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,881.12 : 419,881.32 = 90,352.26 : x
  2. Step 2: Convert to fraction form
    279,881.12/419,881.32 = 90,352.26/x
  3. Step 3: Cross multiply
    279,881.12x = 419,881.32 × 90,352.26
  4. Step 4: Simplify right side
    279,881.12x = 37,937,226,193.78
  5. Step 5: Solve for x
    x = 37,937,226,193.78/279,881.12
  6. Step 6: Final answer
    x = 135,547.64

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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.