Home / 111,905.28-154,428.48-61,603.20

Finding the Fourth Proportional to 111,905.28, 154,428.48 and 61,603.20

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Solution

The fourth proportional to 111,905.28, 154,428.48 and 61,603.20 is: 85,011.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,905.28 : 154,428.48 = 61,603.20 : x
  2. Step 2: Convert to fraction form
    111,905.28/154,428.48 = 61,603.20/x
  3. Step 3: Cross multiply
    111,905.28x = 154,428.48 × 61,603.20
  4. Step 4: Simplify right side
    111,905.28x = 9,513,288,539.14
  5. Step 5: Solve for x
    x = 9,513,288,539.14/111,905.28
  6. Step 6: Final answer
    x = 85,011.97

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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.