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Finding the Fourth Proportional to 218,216.58, 301,136.91 and 122,721.23

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Solution

The fourth proportional to 218,216.58, 301,136.91 and 122,721.23 is: 169,354.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,216.58 : 301,136.91 = 122,721.23 : x
  2. Step 2: Convert to fraction form
    218,216.58/301,136.91 = 122,721.23/x
  3. Step 3: Cross multiply
    218,216.58x = 301,136.91 × 122,721.23
  4. Step 4: Simplify right side
    218,216.58x = 36,955,891,627.80
  5. Step 5: Solve for x
    x = 36,955,891,627.80/218,216.58
  6. Step 6: Final answer
    x = 169,354.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.