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Finding the Fourth Proportional to 205,459.60, 308,707.80 and 130,615.60

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Solution

The fourth proportional to 205,459.60, 308,707.80 and 130,615.60 is: 196,252.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,459.60 : 308,707.80 = 130,615.60 : x
  2. Step 2: Convert to fraction form
    205,459.60/308,707.80 = 130,615.60/x
  3. Step 3: Cross multiply
    205,459.60x = 308,707.80 × 130,615.60
  4. Step 4: Simplify right side
    205,459.60x = 40,322,054,521.68
  5. Step 5: Solve for x
    x = 40,322,054,521.68/205,459.60
  6. Step 6: Final answer
    x = 196,252.96

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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.