Home / 121,029.36-181,420.20-42,078.72

Finding the Fourth Proportional to 121,029.36, 181,420.20 and 42,078.72

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Solution

The fourth proportional to 121,029.36, 181,420.20 and 42,078.72 is: 63,075.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,029.36 : 181,420.20 = 42,078.72 : x
  2. Step 2: Convert to fraction form
    121,029.36/181,420.20 = 42,078.72/x
  3. Step 3: Cross multiply
    121,029.36x = 181,420.20 × 42,078.72
  4. Step 4: Simplify right side
    121,029.36x = 7,633,929,798.14
  5. Step 5: Solve for x
    x = 7,633,929,798.14/121,029.36
  6. Step 6: Final answer
    x = 63,075.02

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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.