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Finding the Fourth Proportional to 111,543.48, 153,922.68 and 66,219.12

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Solution

The fourth proportional to 111,543.48, 153,922.68 and 66,219.12 is: 91,378.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,543.48 : 153,922.68 = 66,219.12 : x
  2. Step 2: Convert to fraction form
    111,543.48/153,922.68 = 66,219.12/x
  3. Step 3: Cross multiply
    111,543.48x = 153,922.68 × 66,219.12
  4. Step 4: Simplify right side
    111,543.48x = 10,192,624,417.64
  5. Step 5: Solve for x
    x = 10,192,624,417.64/111,543.48
  6. Step 6: Final answer
    x = 91,378.04

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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.