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Finding the Fourth Proportional to 261,995.21, 393,069.36 and 84,498.29

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Solution

The fourth proportional to 261,995.21, 393,069.36 and 84,498.29 is: 126,772.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,995.21 : 393,069.36 = 84,498.29 : x
  2. Step 2: Convert to fraction form
    261,995.21/393,069.36 = 84,498.29/x
  3. Step 3: Cross multiply
    261,995.21x = 393,069.36 × 84,498.29
  4. Step 4: Simplify right side
    261,995.21x = 33,213,688,771.39
  5. Step 5: Solve for x
    x = 33,213,688,771.39/261,995.21
  6. Step 6: Final answer
    x = 126,772.12

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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.