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Finding the Fourth Proportional to 153,339.57, 211,621.56 and 86,284.53

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Solution

The fourth proportional to 153,339.57, 211,621.56 and 86,284.53 is: 119,079.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,339.57 : 211,621.56 = 86,284.53 : x
  2. Step 2: Convert to fraction form
    153,339.57/211,621.56 = 86,284.53/x
  3. Step 3: Cross multiply
    153,339.57x = 211,621.56 × 86,284.53
  4. Step 4: Simplify right side
    153,339.57x = 18,259,666,842.47
  5. Step 5: Solve for x
    x = 18,259,666,842.47/153,339.57
  6. Step 6: Final answer
    x = 119,079.94

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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.