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Finding the Fourth Proportional to 153,436.80, 211,745.16 and 86,368.80

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Solution

The fourth proportional to 153,436.80, 211,745.16 and 86,368.80 is: 119,190.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,436.80 : 211,745.16 = 86,368.80 : x
  2. Step 2: Convert to fraction form
    153,436.80/211,745.16 = 86,368.80/x
  3. Step 3: Cross multiply
    153,436.80x = 211,745.16 × 86,368.80
  4. Step 4: Simplify right side
    153,436.80x = 18,288,175,375.01
  5. Step 5: Solve for x
    x = 18,288,175,375.01/153,436.80
  6. Step 6: Final answer
    x = 119,190.28

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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.