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Finding the Fourth Proportional to 111,830.40, 154,328.36 and 61,529.40

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Solution

The fourth proportional to 111,830.40, 154,328.36 and 61,529.40 is: 84,911.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,830.40 : 154,328.36 = 61,529.40 : x
  2. Step 2: Convert to fraction form
    111,830.40/154,328.36 = 61,529.40/x
  3. Step 3: Cross multiply
    111,830.40x = 154,328.36 × 61,529.40
  4. Step 4: Simplify right side
    111,830.40x = 9,495,731,086.14
  5. Step 5: Solve for x
    x = 9,495,731,086.14/111,830.40
  6. Step 6: Final answer
    x = 84,911.89

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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.