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Finding the Fourth Proportional to 121,285.70, 181,928.55 and 108,455.30

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Solution

The fourth proportional to 121,285.70, 181,928.55 and 108,455.30 is: 162,682.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,285.70 : 181,928.55 = 108,455.30 : x
  2. Step 2: Convert to fraction form
    121,285.70/181,928.55 = 108,455.30/x
  3. Step 3: Cross multiply
    121,285.70x = 181,928.55 × 108,455.30
  4. Step 4: Simplify right side
    121,285.70x = 19,731,115,468.82
  5. Step 5: Solve for x
    x = 19,731,115,468.82/121,285.70
  6. Step 6: Final answer
    x = 162,682.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.