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Finding the Fourth Proportional to 218,915.75, 302,103.78 and 118,313.75

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Solution

The fourth proportional to 218,915.75, 302,103.78 and 118,313.75 is: 163,273.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,915.75 : 302,103.78 = 118,313.75 : x
  2. Step 2: Convert to fraction form
    218,915.75/302,103.78 = 118,313.75/x
  3. Step 3: Cross multiply
    218,915.75x = 302,103.78 × 118,313.75
  4. Step 4: Simplify right side
    218,915.75x = 35,743,031,100.98
  5. Step 5: Solve for x
    x = 35,743,031,100.98/218,915.75
  6. Step 6: Final answer
    x = 163,273.00

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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.