Home / 121,328.60-182,187.30-91,779.80

Finding the Fourth Proportional to 121,328.60, 182,187.30 and 91,779.80

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Solution

The fourth proportional to 121,328.60, 182,187.30 and 91,779.80 is: 137,816.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,328.60 : 182,187.30 = 91,779.80 : x
  2. Step 2: Convert to fraction form
    121,328.60/182,187.30 = 91,779.80/x
  3. Step 3: Cross multiply
    121,328.60x = 182,187.30 × 91,779.80
  4. Step 4: Simplify right side
    121,328.60x = 16,721,113,956.54
  5. Step 5: Solve for x
    x = 16,721,113,956.54/121,328.60
  6. Step 6: Final answer
    x = 137,816.76

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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.