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Finding the Fourth Proportional to 111,999.64, 154,515.18 and 77,999.08

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Solution

The fourth proportional to 111,999.64, 154,515.18 and 77,999.08 is: 107,607.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,999.64 : 154,515.18 = 77,999.08 : x
  2. Step 2: Convert to fraction form
    111,999.64/154,515.18 = 77,999.08/x
  3. Step 3: Cross multiply
    111,999.64x = 154,515.18 × 77,999.08
  4. Step 4: Simplify right side
    111,999.64x = 12,052,041,886.03
  5. Step 5: Solve for x
    x = 12,052,041,886.03/111,999.64
  6. Step 6: Final answer
    x = 107,607.86

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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.