Home / 121,001.72-181,521.94-42,138.36

Finding the Fourth Proportional to 121,001.72, 181,521.94 and 42,138.36

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Solution

The fourth proportional to 121,001.72, 181,521.94 and 42,138.36 is: 63,214.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,001.72 : 181,521.94 = 42,138.36 : x
  2. Step 2: Convert to fraction form
    121,001.72/181,521.94 = 42,138.36/x
  3. Step 3: Cross multiply
    121,001.72x = 181,521.94 × 42,138.36
  4. Step 4: Simplify right side
    121,001.72x = 7,649,036,855.62
  5. Step 5: Solve for x
    x = 7,649,036,855.62/121,001.72
  6. Step 6: Final answer
    x = 63,214.28

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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.