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Finding the Fourth Proportional to 165,585.60, 248,239.08 and 72,020.88

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Solution

The fourth proportional to 165,585.60, 248,239.08 and 72,020.88 is: 107,970.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,585.60 : 248,239.08 = 72,020.88 : x
  2. Step 2: Convert to fraction form
    165,585.60/248,239.08 = 72,020.88/x
  3. Step 3: Cross multiply
    165,585.60x = 248,239.08 × 72,020.88
  4. Step 4: Simplify right side
    165,585.60x = 17,878,396,991.99
  5. Step 5: Solve for x
    x = 17,878,396,991.99/165,585.60
  6. Step 6: Final answer
    x = 107,970.72

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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.