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Finding the Fourth Proportional to 153,165.90, 211,377.15 and 89,540.94

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Solution

The fourth proportional to 153,165.90, 211,377.15 and 89,540.94 is: 123,571.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,165.90 : 211,377.15 = 89,540.94 : x
  2. Step 2: Convert to fraction form
    153,165.90/211,377.15 = 89,540.94/x
  3. Step 3: Cross multiply
    153,165.90x = 211,377.15 × 89,540.94
  4. Step 4: Simplify right side
    153,165.90x = 18,926,908,705.52
  5. Step 5: Solve for x
    x = 18,926,908,705.52/153,165.90
  6. Step 6: Final answer
    x = 123,571.30

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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.