Home / 111,904.75-154,428.60-61,603.75

Finding the Fourth Proportional to 111,904.75, 154,428.60 and 61,603.75

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Solution

The fourth proportional to 111,904.75, 154,428.60 and 61,603.75 is: 85,013.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,904.75 : 154,428.60 = 61,603.75 : x
  2. Step 2: Convert to fraction form
    111,904.75/154,428.60 = 61,603.75/x
  3. Step 3: Cross multiply
    111,904.75x = 154,428.60 × 61,603.75
  4. Step 4: Simplify right side
    111,904.75x = 9,513,380,867.25
  5. Step 5: Solve for x
    x = 9,513,380,867.25/111,904.75
  6. Step 6: Final answer
    x = 85,013.20

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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.