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Finding the Fourth Proportional to 111,338.92, 153,530.53 and 84,178.81

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Solution

The fourth proportional to 111,338.92, 153,530.53 and 84,178.81 is: 116,078.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,338.92 : 153,530.53 = 84,178.81 : x
  2. Step 2: Convert to fraction form
    111,338.92/153,530.53 = 84,178.81/x
  3. Step 3: Cross multiply
    111,338.92x = 153,530.53 × 84,178.81
  4. Step 4: Simplify right side
    111,338.92x = 12,924,017,314.07
  5. Step 5: Solve for x
    x = 12,924,017,314.07/111,338.92
  6. Step 6: Final answer
    x = 116,078.16

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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.