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Finding the Fourth Proportional to 104,818.40, 144,627 and 66,590

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Solution

The fourth proportional to 104,818.40, 144,627 and 66,590 is: 91,879.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,818.40 : 144,627 = 66,590 : x
  2. Step 2: Convert to fraction form
    104,818.40/144,627 = 66,590/x
  3. Step 3: Cross multiply
    104,818.40x = 144,627 × 66,590
  4. Step 4: Simplify right side
    104,818.40x = 9,630,711,930
  5. Step 5: Solve for x
    x = 9,630,711,930/104,818.40
  6. Step 6: Final answer
    x = 91,879.97

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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.