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Finding the Fourth Proportional to 213,186.72, 319,748.08 and 134,059.68

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Solution

The fourth proportional to 213,186.72, 319,748.08 and 134,059.68 is: 201,069.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,186.72 : 319,748.08 = 134,059.68 : x
  2. Step 2: Convert to fraction form
    213,186.72/319,748.08 = 134,059.68/x
  3. Step 3: Cross multiply
    213,186.72x = 319,748.08 × 134,059.68
  4. Step 4: Simplify right side
    213,186.72x = 42,865,325,285.41
  5. Step 5: Solve for x
    x = 42,865,325,285.41/213,186.72
  6. Step 6: Final answer
    x = 201,069.40

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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.