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Finding the Fourth Proportional to 111,618, 154,035.54 and 61,317

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Solution

The fourth proportional to 111,618, 154,035.54 and 61,317 is: 84,618.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,618 : 154,035.54 = 61,317 : x
  2. Step 2: Convert to fraction form
    111,618/154,035.54 = 61,317/x
  3. Step 3: Cross multiply
    111,618x = 154,035.54 × 61,317
  4. Step 4: Simplify right side
    111,618x = 9,444,997,206.18
  5. Step 5: Solve for x
    x = 9,444,997,206.18/111,618
  6. Step 6: Final answer
    x = 84,618.94

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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.