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Finding the Fourth Proportional to 153,171.47, 211,374.74 and 86,103.47

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Solution

The fourth proportional to 153,171.47, 211,374.74 and 86,103.47 is: 118,821.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,171.47 : 211,374.74 = 86,103.47 : x
  2. Step 2: Convert to fraction form
    153,171.47/211,374.74 = 86,103.47/x
  3. Step 3: Cross multiply
    153,171.47x = 211,374.74 × 86,103.47
  4. Step 4: Simplify right side
    153,171.47x = 18,200,097,742.73
  5. Step 5: Solve for x
    x = 18,200,097,742.73/153,171.47
  6. Step 6: Final answer
    x = 118,821.73

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1.5x scale

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.