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Finding the Fourth Proportional to 111,698.14, 154,143.44 and 61,397.14

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Solution

The fourth proportional to 111,698.14, 154,143.44 and 61,397.14 is: 84,728.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,698.14 : 154,143.44 = 61,397.14 : x
  2. Step 2: Convert to fraction form
    111,698.14/154,143.44 = 61,397.14/x
  3. Step 3: Cross multiply
    111,698.14x = 154,143.44 × 61,397.14
  4. Step 4: Simplify right side
    111,698.14x = 9,463,966,365.76
  5. Step 5: Solve for x
    x = 9,463,966,365.76/111,698.14
  6. Step 6: Final answer
    x = 84,728.06

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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.