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Finding the Fourth Proportional to 111,959.28, 154,503.05 and 61,658.28

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Solution

The fourth proportional to 111,959.28, 154,503.05 and 61,658.28 is: 85,088.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,959.28 : 154,503.05 = 61,658.28 : x
  2. Step 2: Convert to fraction form
    111,959.28/154,503.05 = 61,658.28/x
  3. Step 3: Cross multiply
    111,959.28x = 154,503.05 × 61,658.28
  4. Step 4: Simplify right side
    111,959.28x = 9,526,392,009.46
  5. Step 5: Solve for x
    x = 9,526,392,009.46/111,959.28
  6. Step 6: Final answer
    x = 85,088.01

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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.