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Finding the Fourth Proportional to 111,594.78, 153,932.81 and 66,242.07

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Solution

The fourth proportional to 111,594.78, 153,932.81 and 66,242.07 is: 91,373.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,594.78 : 153,932.81 = 66,242.07 : x
  2. Step 2: Convert to fraction form
    111,594.78/153,932.81 = 66,242.07/x
  3. Step 3: Cross multiply
    111,594.78x = 153,932.81 × 66,242.07
  4. Step 4: Simplify right side
    111,594.78x = 10,196,827,644.11
  5. Step 5: Solve for x
    x = 10,196,827,644.11/111,594.78
  6. Step 6: Final answer
    x = 91,373.70

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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.