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Finding the Fourth Proportional to 134,541, 185,684.40 and 86,932.80

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Solution

The fourth proportional to 134,541, 185,684.40 and 86,932.80 is: 119,978.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,541 : 185,684.40 = 86,932.80 : x
  2. Step 2: Convert to fraction form
    134,541/185,684.40 = 86,932.80/x
  3. Step 3: Cross multiply
    134,541x = 185,684.40 × 86,932.80
  4. Step 4: Simplify right side
    134,541x = 16,142,064,808.32
  5. Step 5: Solve for x
    x = 16,142,064,808.32/134,541
  6. Step 6: Final answer
    x = 119,978.78

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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.