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Finding the Fourth Proportional to 118,668.45, 163,762.67 and 64,956.87

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Solution

The fourth proportional to 118,668.45, 163,762.67 and 64,956.87 is: 89,640.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,668.45 : 163,762.67 = 64,956.87 : x
  2. Step 2: Convert to fraction form
    118,668.45/163,762.67 = 64,956.87/x
  3. Step 3: Cross multiply
    118,668.45x = 163,762.67 × 64,956.87
  4. Step 4: Simplify right side
    118,668.45x = 10,637,510,466.04
  5. Step 5: Solve for x
    x = 10,637,510,466.04/118,668.45
  6. Step 6: Final answer
    x = 89,640.60

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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.