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Finding the Fourth Proportional to 216,730.22, 299,099.32 and 121,231.22

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Solution

The fourth proportional to 216,730.22, 299,099.32 and 121,231.22 is: 167,305.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,730.22 : 299,099.32 = 121,231.22 : x
  2. Step 2: Convert to fraction form
    216,730.22/299,099.32 = 121,231.22/x
  3. Step 3: Cross multiply
    216,730.22x = 299,099.32 × 121,231.22
  4. Step 4: Simplify right side
    216,730.22x = 36,260,173,666.20
  5. Step 5: Solve for x
    x = 36,260,173,666.20/216,730.22
  6. Step 6: Final answer
    x = 167,305.58

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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.