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Finding the Fourth Proportional to 141,668.10, 212,256.86 and 99,468.05

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Solution

The fourth proportional to 141,668.10, 212,256.86 and 99,468.05 is: 149,029.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,668.10 : 212,256.86 = 99,468.05 : x
  2. Step 2: Convert to fraction form
    141,668.10/212,256.86 = 99,468.05/x
  3. Step 3: Cross multiply
    141,668.10x = 212,256.86 × 99,468.05
  4. Step 4: Simplify right side
    141,668.10x = 21,112,774,404.70
  5. Step 5: Solve for x
    x = 21,112,774,404.70/141,668.10
  6. Step 6: Final answer
    x = 149,029.84

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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.