Home / 111,991.12-154,549.60-61,690.16

Finding the Fourth Proportional to 111,991.12, 154,549.60 and 61,690.16

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Solution

The fourth proportional to 111,991.12, 154,549.60 and 61,690.16 is: 85,133.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,991.12 : 154,549.60 = 61,690.16 : x
  2. Step 2: Convert to fraction form
    111,991.12/154,549.60 = 61,690.16/x
  3. Step 3: Cross multiply
    111,991.12x = 154,549.60 × 61,690.16
  4. Step 4: Simplify right side
    111,991.12x = 9,534,189,551.94
  5. Step 5: Solve for x
    x = 9,534,189,551.94/111,991.12
  6. Step 6: Final answer
    x = 85,133.44

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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.