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Finding the Fourth Proportional to 121,870.60, 182,805.90 and 106,318.60

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Solution

The fourth proportional to 121,870.60, 182,805.90 and 106,318.60 is: 159,477.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,870.60 : 182,805.90 = 106,318.60 : x
  2. Step 2: Convert to fraction form
    121,870.60/182,805.90 = 106,318.60/x
  3. Step 3: Cross multiply
    121,870.60x = 182,805.90 × 106,318.60
  4. Step 4: Simplify right side
    121,870.60x = 19,435,667,359.74
  5. Step 5: Solve for x
    x = 19,435,667,359.74/121,870.60
  6. Step 6: Final answer
    x = 159,477.90

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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.