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Finding the Fourth Proportional to 111,351.68, 153,690.41 and 93,415.55

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Solution

The fourth proportional to 111,351.68, 153,690.41 and 93,415.55 is: 128,934.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,351.68 : 153,690.41 = 93,415.55 : x
  2. Step 2: Convert to fraction form
    111,351.68/153,690.41 = 93,415.55/x
  3. Step 3: Cross multiply
    111,351.68x = 153,690.41 × 93,415.55
  4. Step 4: Simplify right side
    111,351.68x = 14,357,073,644.96
  5. Step 5: Solve for x
    x = 14,357,073,644.96/111,351.68
  6. Step 6: Final answer
    x = 128,934.51

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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.