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Finding the Fourth Proportional to 131,322.63, 196,668.30 and 74,992.20

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Solution

The fourth proportional to 131,322.63, 196,668.30 and 74,992.20 is: 112,308.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,322.63 : 196,668.30 = 74,992.20 : x
  2. Step 2: Convert to fraction form
    131,322.63/196,668.30 = 74,992.20/x
  3. Step 3: Cross multiply
    131,322.63x = 196,668.30 × 74,992.20
  4. Step 4: Simplify right side
    131,322.63x = 14,748,588,487.26
  5. Step 5: Solve for x
    x = 14,748,588,487.26/131,322.63
  6. Step 6: Final answer
    x = 112,308.05

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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.