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Finding the Fourth Proportional to 86,511, 119,277.03 and 72,191.43

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Solution

The fourth proportional to 86,511, 119,277.03 and 72,191.43 is: 99,533.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,511 : 119,277.03 = 72,191.43 : x
  2. Step 2: Convert to fraction form
    86,511/119,277.03 = 72,191.43/x
  3. Step 3: Cross multiply
    86,511x = 119,277.03 × 72,191.43
  4. Step 4: Simplify right side
    86,511x = 8,610,779,361.85
  5. Step 5: Solve for x
    x = 8,610,779,361.85/86,511
  6. Step 6: Final answer
    x = 99,533.92

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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.