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Finding the Fourth Proportional to 271,987.21, 407,980.74 and 84,998.71

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Solution

The fourth proportional to 271,987.21, 407,980.74 and 84,998.71 is: 127,498.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,987.21 : 407,980.74 = 84,998.71 : x
  2. Step 2: Convert to fraction form
    271,987.21/407,980.74 = 84,998.71/x
  3. Step 3: Cross multiply
    271,987.21x = 407,980.74 × 84,998.71
  4. Step 4: Simplify right side
    271,987.21x = 34,677,836,604.85
  5. Step 5: Solve for x
    x = 34,677,836,604.85/271,987.21
  6. Step 6: Final answer
    x = 127,498.04

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1.5x scale

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.