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Finding the Fourth Proportional to 111,821, 154,312.98 and 61,518.92

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Solution

The fourth proportional to 111,821, 154,312.98 and 61,518.92 is: 84,896.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,821 : 154,312.98 = 61,518.92 : x
  2. Step 2: Convert to fraction form
    111,821/154,312.98 = 61,518.92/x
  3. Step 3: Cross multiply
    111,821x = 154,312.98 × 61,518.92
  4. Step 4: Simplify right side
    111,821x = 9,493,167,871.58
  5. Step 5: Solve for x
    x = 9,493,167,871.58/111,821
  6. Step 6: Final answer
    x = 84,896.11

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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.