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Finding the Fourth Proportional to 121,694.31, 168,797.32 and 118,457.55

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Solution

The fourth proportional to 121,694.31, 168,797.32 and 118,457.55 is: 164,307.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,694.31 : 168,797.32 = 118,457.55 : x
  2. Step 2: Convert to fraction form
    121,694.31/168,797.32 = 118,457.55/x
  3. Step 3: Cross multiply
    121,694.31x = 168,797.32 × 118,457.55
  4. Step 4: Simplify right side
    121,694.31x = 19,995,316,677.62
  5. Step 5: Solve for x
    x = 19,995,316,677.62/121,694.31
  6. Step 6: Final answer
    x = 164,307.74

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.