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Finding the Fourth Proportional to 153,361.56, 211,633.76 and 86,280.60

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Solution

The fourth proportional to 153,361.56, 211,633.76 and 86,280.60 is: 119,064.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,361.56 : 211,633.76 = 86,280.60 : x
  2. Step 2: Convert to fraction form
    153,361.56/211,633.76 = 86,280.60/x
  3. Step 3: Cross multiply
    153,361.56x = 211,633.76 × 86,280.60
  4. Step 4: Simplify right side
    153,361.56x = 18,259,887,793.06
  5. Step 5: Solve for x
    x = 18,259,887,793.06/153,361.56
  6. Step 6: Final answer
    x = 119,064.31

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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.