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Finding the Fourth Proportional to 153,353.80, 211,623.06 and 86,272.84

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Solution

The fourth proportional to 153,353.80, 211,623.06 and 86,272.84 is: 119,053.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,353.80 : 211,623.06 = 86,272.84 : x
  2. Step 2: Convert to fraction form
    153,353.80/211,623.06 = 86,272.84/x
  3. Step 3: Cross multiply
    153,353.80x = 211,623.06 × 86,272.84
  4. Step 4: Simplify right side
    153,353.80x = 18,257,322,395.69
  5. Step 5: Solve for x
    x = 18,257,322,395.69/153,353.80
  6. Step 6: Final answer
    x = 119,053.60

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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.