Home / 120,990.76-181,509.03-39,942.36

Finding the Fourth Proportional to 120,990.76, 181,509.03 and 39,942.36

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Solution

The fourth proportional to 120,990.76, 181,509.03 and 39,942.36 is: 59,921.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,990.76 : 181,509.03 = 39,942.36 : x
  2. Step 2: Convert to fraction form
    120,990.76/181,509.03 = 39,942.36/x
  3. Step 3: Cross multiply
    120,990.76x = 181,509.03 × 39,942.36
  4. Step 4: Simplify right side
    120,990.76x = 7,249,899,019.51
  5. Step 5: Solve for x
    x = 7,249,899,019.51/120,990.76
  6. Step 6: Final answer
    x = 59,921.10

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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.