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Finding the Fourth Proportional to 248,668.65, 343,162.62 and 135,491.40

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Solution

The fourth proportional to 248,668.65, 343,162.62 and 135,491.40 is: 186,978.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,668.65 : 343,162.62 = 135,491.40 : x
  2. Step 2: Convert to fraction form
    248,668.65/343,162.62 = 135,491.40/x
  3. Step 3: Cross multiply
    248,668.65x = 343,162.62 × 135,491.40
  4. Step 4: Simplify right side
    248,668.65x = 46,495,583,811.47
  5. Step 5: Solve for x
    x = 46,495,583,811.47/248,668.65
  6. Step 6: Final answer
    x = 186,978.07

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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.