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Finding the Fourth Proportional to 111,578.12, 153,977.80 and 61,277.12

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Solution

The fourth proportional to 111,578.12, 153,977.80 and 61,277.12 is: 84,562.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,578.12 : 153,977.80 = 61,277.12 : x
  2. Step 2: Convert to fraction form
    111,578.12/153,977.80 = 61,277.12/x
  3. Step 3: Cross multiply
    111,578.12x = 153,977.80 × 61,277.12
  4. Step 4: Simplify right side
    111,578.12x = 9,435,316,127.94
  5. Step 5: Solve for x
    x = 9,435,316,127.94/111,578.12
  6. Step 6: Final answer
    x = 84,562.42

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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.