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Finding the Fourth Proportional to 111,412.51, 153,734.47 and 63,021.04

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Solution

The fourth proportional to 111,412.51, 153,734.47 and 63,021.04 is: 86,960.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,412.51 : 153,734.47 = 63,021.04 : x
  2. Step 2: Convert to fraction form
    111,412.51/153,734.47 = 63,021.04/x
  3. Step 3: Cross multiply
    111,412.51x = 153,734.47 × 63,021.04
  4. Step 4: Simplify right side
    111,412.51x = 9,688,505,995.85
  5. Step 5: Solve for x
    x = 9,688,505,995.85/111,412.51
  6. Step 6: Final answer
    x = 86,960.66

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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.