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Finding the Fourth Proportional to 245,781.20, 368,455.80 and 166,638.80

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Solution

The fourth proportional to 245,781.20, 368,455.80 and 166,638.80 is: 249,811.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,781.20 : 368,455.80 = 166,638.80 : x
  2. Step 2: Convert to fraction form
    245,781.20/368,455.80 = 166,638.80/x
  3. Step 3: Cross multiply
    245,781.20x = 368,455.80 × 166,638.80
  4. Step 4: Simplify right side
    245,781.20x = 61,399,032,365.04
  5. Step 5: Solve for x
    x = 61,399,032,365.04/245,781.20
  6. Step 6: Final answer
    x = 249,811.75

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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.