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Finding the Fourth Proportional to 205,241.60, 307,891.20 and 64,985.60

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Solution

The fourth proportional to 205,241.60, 307,891.20 and 64,985.60 is: 97,487.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,241.60 : 307,891.20 = 64,985.60 : x
  2. Step 2: Convert to fraction form
    205,241.60/307,891.20 = 64,985.60/x
  3. Step 3: Cross multiply
    205,241.60x = 307,891.20 × 64,985.60
  4. Step 4: Simplify right side
    205,241.60x = 20,008,494,366.72
  5. Step 5: Solve for x
    x = 20,008,494,366.72/205,241.60
  6. Step 6: Final answer
    x = 97,487.52

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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.