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Finding the Fourth Proportional to 153,171.61, 211,345.57 and 89,497.09

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Solution

The fourth proportional to 153,171.61, 211,345.57 and 89,497.09 is: 123,487.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,171.61 : 211,345.57 = 89,497.09 : x
  2. Step 2: Convert to fraction form
    153,171.61/211,345.57 = 89,497.09/x
  3. Step 3: Cross multiply
    153,171.61x = 211,345.57 × 89,497.09
  4. Step 4: Simplify right side
    153,171.61x = 18,914,813,499.39
  5. Step 5: Solve for x
    x = 18,914,813,499.39/153,171.61
  6. Step 6: Final answer
    x = 123,487.72

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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.