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Finding the Fourth Proportional to 153,388.88, 211,671.40 and 86,307.92

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Solution

The fourth proportional to 153,388.88, 211,671.40 and 86,307.92 is: 119,101.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,388.88 : 211,671.40 = 86,307.92 : x
  2. Step 2: Convert to fraction form
    153,388.88/211,671.40 = 86,307.92/x
  3. Step 3: Cross multiply
    153,388.88x = 211,671.40 × 86,307.92
  4. Step 4: Simplify right side
    153,388.88x = 18,268,918,257.49
  5. Step 5: Solve for x
    x = 18,268,918,257.49/153,388.88
  6. Step 6: Final answer
    x = 119,101.97

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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.