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Finding the Fourth Proportional to 121,912.99, 182,869.72 and 65,779.52

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Solution

The fourth proportional to 121,912.99, 182,869.72 and 65,779.52 is: 98,669.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,912.99 : 182,869.72 = 65,779.52 : x
  2. Step 2: Convert to fraction form
    121,912.99/182,869.72 = 65,779.52/x
  3. Step 3: Cross multiply
    121,912.99x = 182,869.72 × 65,779.52
  4. Step 4: Simplify right side
    121,912.99x = 12,029,081,325.34
  5. Step 5: Solve for x
    x = 12,029,081,325.34/121,912.99
  6. Step 6: Final answer
    x = 98,669.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.