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Finding the Fourth Proportional to 111,555.20, 153,946.16 and 61,254.20

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Solution

The fourth proportional to 111,555.20, 153,946.16 and 61,254.20 is: 84,530.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,555.20 : 153,946.16 = 61,254.20 : x
  2. Step 2: Convert to fraction form
    111,555.20/153,946.16 = 61,254.20/x
  3. Step 3: Cross multiply
    111,555.20x = 153,946.16 × 61,254.20
  4. Step 4: Simplify right side
    111,555.20x = 9,429,847,797.87
  5. Step 5: Solve for x
    x = 9,429,847,797.87/111,555.20
  6. Step 6: Final answer
    x = 84,530.78

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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.