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Finding the Fourth Proportional to 111,830.72, 154,383.54 and 86,279.72

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Solution

The fourth proportional to 111,830.72, 154,383.54 and 86,279.72 is: 119,110.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,830.72 : 154,383.54 = 86,279.72 : x
  2. Step 2: Convert to fraction form
    111,830.72/154,383.54 = 86,279.72/x
  3. Step 3: Cross multiply
    111,830.72x = 154,383.54 × 86,279.72
  4. Step 4: Simplify right side
    111,830.72x = 13,320,168,603.81
  5. Step 5: Solve for x
    x = 13,320,168,603.81/111,830.72
  6. Step 6: Final answer
    x = 119,110.10

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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.