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Finding the Fourth Proportional to 181,855.90, 251,065.22 and 121,528.72

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Solution

The fourth proportional to 181,855.90, 251,065.22 and 121,528.72 is: 167,779.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,855.90 : 251,065.22 = 121,528.72 : x
  2. Step 2: Convert to fraction form
    181,855.90/251,065.22 = 121,528.72/x
  3. Step 3: Cross multiply
    181,855.90x = 251,065.22 × 121,528.72
  4. Step 4: Simplify right side
    181,855.90x = 30,511,634,823.12
  5. Step 5: Solve for x
    x = 30,511,634,823.12/181,855.90
  6. Step 6: Final answer
    x = 167,779.19

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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.