Home / 121,012.78-181,504.58-42,120.40

Finding the Fourth Proportional to 121,012.78, 181,504.58 and 42,120.40

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Solution

The fourth proportional to 121,012.78, 181,504.58 and 42,120.40 is: 63,175.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,012.78 : 181,504.58 = 42,120.40 : x
  2. Step 2: Convert to fraction form
    121,012.78/181,504.58 = 42,120.40/x
  3. Step 3: Cross multiply
    121,012.78x = 181,504.58 × 42,120.40
  4. Step 4: Simplify right side
    121,012.78x = 7,645,045,511.43
  5. Step 5: Solve for x
    x = 7,645,045,511.43/121,012.78
  6. Step 6: Final answer
    x = 63,175.52

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1.5x scale

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.