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Finding the Fourth Proportional to 153,349.69, 211,620.29 and 85,366.54

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Solution

The fourth proportional to 153,349.69, 211,620.29 and 85,366.54 is: 117,804.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,349.69 : 211,620.29 = 85,366.54 : x
  2. Step 2: Convert to fraction form
    153,349.69/211,620.29 = 85,366.54/x
  3. Step 3: Cross multiply
    153,349.69x = 211,620.29 × 85,366.54
  4. Step 4: Simplify right side
    153,349.69x = 18,065,291,951.10
  5. Step 5: Solve for x
    x = 18,065,291,951.10/153,349.69
  6. Step 6: Final answer
    x = 117,804.55

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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.