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Finding the Fourth Proportional to 216,879.57, 299,293.74 and 121,386.24

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Solution

The fourth proportional to 216,879.57, 299,293.74 and 121,386.24 is: 167,512.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,879.57 : 299,293.74 = 121,386.24 : x
  2. Step 2: Convert to fraction form
    216,879.57/299,293.74 = 121,386.24/x
  3. Step 3: Cross multiply
    216,879.57x = 299,293.74 × 121,386.24
  4. Step 4: Simplify right side
    216,879.57x = 36,330,141,754.14
  5. Step 5: Solve for x
    x = 36,330,141,754.14/216,879.57
  6. Step 6: Final answer
    x = 167,512.97

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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.