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Finding the Fourth Proportional to 65,980.91, 90,931.55 and 46,861.52

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Solution

The fourth proportional to 65,980.91, 90,931.55 and 46,861.52 is: 64,582.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,980.91 : 90,931.55 = 46,861.52 : x
  2. Step 2: Convert to fraction form
    65,980.91/90,931.55 = 46,861.52/x
  3. Step 3: Cross multiply
    65,980.91x = 90,931.55 × 46,861.52
  4. Step 4: Simplify right side
    65,980.91x = 4,261,190,414.65
  5. Step 5: Solve for x
    x = 4,261,190,414.65/65,980.91
  6. Step 6: Final answer
    x = 64,582.17

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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.