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Finding the Fourth Proportional to 111,905.07, 154,428.84 and 61,604.07

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Solution

The fourth proportional to 111,905.07, 154,428.84 and 61,604.07 is: 85,013.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,905.07 : 154,428.84 = 61,604.07 : x
  2. Step 2: Convert to fraction form
    111,905.07/154,428.84 = 61,604.07/x
  3. Step 3: Cross multiply
    111,905.07x = 154,428.84 × 61,604.07
  4. Step 4: Simplify right side
    111,905.07x = 9,513,445,069.38
  5. Step 5: Solve for x
    x = 9,513,445,069.38/111,905.07
  6. Step 6: Final answer
    x = 85,013.53

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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.