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Finding the Fourth Proportional to 111,897.68, 154,420.75 and 60,911.87

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Solution

The fourth proportional to 111,897.68, 154,420.75 and 60,911.87 is: 84,059.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,897.68 : 154,420.75 = 60,911.87 : x
  2. Step 2: Convert to fraction form
    111,897.68/154,420.75 = 60,911.87/x
  3. Step 3: Cross multiply
    111,897.68x = 154,420.75 × 60,911.87
  4. Step 4: Simplify right side
    111,897.68x = 9,406,055,953.34
  5. Step 5: Solve for x
    x = 9,406,055,953.34/111,897.68
  6. Step 6: Final answer
    x = 84,059.44

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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.