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Finding the Fourth Proportional to 149,008.16, 205,627.20 and 81,940.16

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Solution

The fourth proportional to 149,008.16, 205,627.20 and 81,940.16 is: 113,075.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,008.16 : 205,627.20 = 81,940.16 : x
  2. Step 2: Convert to fraction form
    149,008.16/205,627.20 = 81,940.16/x
  3. Step 3: Cross multiply
    149,008.16x = 205,627.20 × 81,940.16
  4. Step 4: Simplify right side
    149,008.16x = 16,849,125,668.35
  5. Step 5: Solve for x
    x = 16,849,125,668.35/149,008.16
  6. Step 6: Final answer
    x = 113,075.19

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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.