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Finding the Fourth Proportional to 111,174.70, 153,317.43 and 102,918.10

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Solution

The fourth proportional to 111,174.70, 153,317.43 and 102,918.10 is: 141,931.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,174.70 : 153,317.43 = 102,918.10 : x
  2. Step 2: Convert to fraction form
    111,174.70/153,317.43 = 102,918.10/x
  3. Step 3: Cross multiply
    111,174.70x = 153,317.43 × 102,918.10
  4. Step 4: Simplify right side
    111,174.70x = 15,779,138,592.48
  5. Step 5: Solve for x
    x = 15,779,138,592.48/111,174.70
  6. Step 6: Final answer
    x = 141,931.02

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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.