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Finding the Fourth Proportional to 153,418.80, 211,720.32 and 86,350.80

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Solution

The fourth proportional to 153,418.80, 211,720.32 and 86,350.80 is: 119,165.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,418.80 : 211,720.32 = 86,350.80 : x
  2. Step 2: Convert to fraction form
    153,418.80/211,720.32 = 86,350.80/x
  3. Step 3: Cross multiply
    153,418.80x = 211,720.32 × 86,350.80
  4. Step 4: Simplify right side
    153,418.80x = 18,282,219,008.26
  5. Step 5: Solve for x
    x = 18,282,219,008.26/153,418.80
  6. Step 6: Final answer
    x = 119,165.44

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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.