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Finding the Fourth Proportional to 121,934.54, 168,285.12 and 74,185.04

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Solution

The fourth proportional to 121,934.54, 168,285.12 and 74,185.04 is: 102,384.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,934.54 : 168,285.12 = 74,185.04 : x
  2. Step 2: Convert to fraction form
    121,934.54/168,285.12 = 74,185.04/x
  3. Step 3: Cross multiply
    121,934.54x = 168,285.12 × 74,185.04
  4. Step 4: Simplify right side
    121,934.54x = 12,484,238,358.60
  5. Step 5: Solve for x
    x = 12,484,238,358.60/121,934.54
  6. Step 6: Final answer
    x = 102,384.76

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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.