Home / 81,186.98-121,779.03-31,277.90

Finding the Fourth Proportional to 81,186.98, 121,779.03 and 31,277.90

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Solution

The fourth proportional to 81,186.98, 121,779.03 and 31,277.90 is: 46,916.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,186.98 : 121,779.03 = 31,277.90 : x
  2. Step 2: Convert to fraction form
    81,186.98/121,779.03 = 31,277.90/x
  3. Step 3: Cross multiply
    81,186.98x = 121,779.03 × 31,277.90
  4. Step 4: Simplify right side
    81,186.98x = 3,808,992,322.44
  5. Step 5: Solve for x
    x = 3,808,992,322.44/81,186.98
  6. Step 6: Final answer
    x = 46,916.30

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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.