Home / 121,021.32-181,556.61-42,141.72

Finding the Fourth Proportional to 121,021.32, 181,556.61 and 42,141.72

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Solution

The fourth proportional to 121,021.32, 181,556.61 and 42,141.72 is: 63,221.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,021.32 : 181,556.61 = 42,141.72 : x
  2. Step 2: Convert to fraction form
    121,021.32/181,556.61 = 42,141.72/x
  3. Step 3: Cross multiply
    121,021.32x = 181,556.61 × 42,141.72
  4. Step 4: Simplify right side
    121,021.32x = 7,651,107,822.77
  5. Step 5: Solve for x
    x = 7,651,107,822.77/121,021.32
  6. Step 6: Final answer
    x = 63,221.16

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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.