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Finding the Fourth Proportional to 153,411.63, 211,727.48 and 86,356.59

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Solution

The fourth proportional to 153,411.63, 211,727.48 and 86,356.59 is: 119,183.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,411.63 : 211,727.48 = 86,356.59 : x
  2. Step 2: Convert to fraction form
    153,411.63/211,727.48 = 86,356.59/x
  3. Step 3: Cross multiply
    153,411.63x = 211,727.48 × 86,356.59
  4. Step 4: Simplify right side
    153,411.63x = 18,284,063,182.09
  5. Step 5: Solve for x
    x = 18,284,063,182.09/153,411.63
  6. Step 6: Final answer
    x = 119,183.03

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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.