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Finding the Fourth Proportional to 221,915.79, 306,157.73 and 141,328.89

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Solution

The fourth proportional to 221,915.79, 306,157.73 and 141,328.89 is: 194,979.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,915.79 : 306,157.73 = 141,328.89 : x
  2. Step 2: Convert to fraction form
    221,915.79/306,157.73 = 141,328.89/x
  3. Step 3: Cross multiply
    221,915.79x = 306,157.73 × 141,328.89
  4. Step 4: Simplify right side
    221,915.79x = 43,268,931,439.18
  5. Step 5: Solve for x
    x = 43,268,931,439.18/221,915.79
  6. Step 6: Final answer
    x = 194,979.06

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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.