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Finding the Fourth Proportional to 153,289.60, 211,546.56 and 86,221.60

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Solution

The fourth proportional to 153,289.60, 211,546.56 and 86,221.60 is: 118,989.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,289.60 : 211,546.56 = 86,221.60 : x
  2. Step 2: Convert to fraction form
    153,289.60/211,546.56 = 86,221.60/x
  3. Step 3: Cross multiply
    153,289.60x = 211,546.56 × 86,221.60
  4. Step 4: Simplify right side
    153,289.60x = 18,239,882,877.70
  5. Step 5: Solve for x
    x = 18,239,882,877.70/153,289.60
  6. Step 6: Final answer
    x = 118,989.70

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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.