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Finding the Fourth Proportional to 205,605.60, 307,947.60 and 122,661.60

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Solution

The fourth proportional to 205,605.60, 307,947.60 and 122,661.60 is: 183,717.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,605.60 : 307,947.60 = 122,661.60 : x
  2. Step 2: Convert to fraction form
    205,605.60/307,947.60 = 122,661.60/x
  3. Step 3: Cross multiply
    205,605.60x = 307,947.60 × 122,661.60
  4. Step 4: Simplify right side
    205,605.60x = 37,773,345,332.16
  5. Step 5: Solve for x
    x = 37,773,345,332.16/205,605.60
  6. Step 6: Final answer
    x = 183,717.49

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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.