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Finding the Fourth Proportional to 118,412.94, 163,407.92 and 64,696.80

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Solution

The fourth proportional to 118,412.94, 163,407.92 and 64,696.80 is: 89,280.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,412.94 : 163,407.92 = 64,696.80 : x
  2. Step 2: Convert to fraction form
    118,412.94/163,407.92 = 64,696.80/x
  3. Step 3: Cross multiply
    118,412.94x = 163,407.92 × 64,696.80
  4. Step 4: Simplify right side
    118,412.94x = 10,571,969,195.17
  5. Step 5: Solve for x
    x = 10,571,969,195.17/118,412.94
  6. Step 6: Final answer
    x = 89,280.52

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1.5x scale

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.