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Finding the Fourth Proportional to 86,605, 119,514.90 and 46,861

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Solution

The fourth proportional to 86,605, 119,514.90 and 46,861 is: 64,668.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,605 : 119,514.90 = 46,861 : x
  2. Step 2: Convert to fraction form
    86,605/119,514.90 = 46,861/x
  3. Step 3: Cross multiply
    86,605x = 119,514.90 × 46,861
  4. Step 4: Simplify right side
    86,605x = 5,600,587,728.90
  5. Step 5: Solve for x
    x = 5,600,587,728.90/86,605
  6. Step 6: Final answer
    x = 64,668.18

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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.