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Finding the Fourth Proportional to 281,181.75, 388,035.68 and 153,859.47

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Solution

The fourth proportional to 281,181.75, 388,035.68 and 153,859.47 is: 212,328.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,181.75 : 388,035.68 = 153,859.47 : x
  2. Step 2: Convert to fraction form
    281,181.75/388,035.68 = 153,859.47/x
  3. Step 3: Cross multiply
    281,181.75x = 388,035.68 × 153,859.47
  4. Step 4: Simplify right side
    281,181.75x = 59,702,963,296.59
  5. Step 5: Solve for x
    x = 59,702,963,296.59/281,181.75
  6. Step 6: Final answer
    x = 212,328.73

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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.