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Finding the Fourth Proportional to 205,817.60, 308,726.40 and 125,638.40

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Solution

The fourth proportional to 205,817.60, 308,726.40 and 125,638.40 is: 188,457.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,817.60 : 308,726.40 = 125,638.40 : x
  2. Step 2: Convert to fraction form
    205,817.60/308,726.40 = 125,638.40/x
  3. Step 3: Cross multiply
    205,817.60x = 308,726.40 × 125,638.40
  4. Step 4: Simplify right side
    205,817.60x = 38,787,890,933.76
  5. Step 5: Solve for x
    x = 38,787,890,933.76/205,817.60
  6. Step 6: Final answer
    x = 188,457.60

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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.