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Finding the Fourth Proportional to 213,698.91, 294,920.51 and 121,820.39

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Solution

The fourth proportional to 213,698.91, 294,920.51 and 121,820.39 is: 168,121.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,698.91 : 294,920.51 = 121,820.39 : x
  2. Step 2: Convert to fraction form
    213,698.91/294,920.51 = 121,820.39/x
  3. Step 3: Cross multiply
    213,698.91x = 294,920.51 × 121,820.39
  4. Step 4: Simplify right side
    213,698.91x = 35,927,329,920.32
  5. Step 5: Solve for x
    x = 35,927,329,920.32/213,698.91
  6. Step 6: Final answer
    x = 168,121.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.