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Finding the Fourth Proportional to 171,980.96, 258,071.88 and 72,133.52

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Solution

The fourth proportional to 171,980.96, 258,071.88 and 72,133.52 is: 108,242.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,980.96 : 258,071.88 = 72,133.52 : x
  2. Step 2: Convert to fraction form
    171,980.96/258,071.88 = 72,133.52/x
  3. Step 3: Cross multiply
    171,980.96x = 258,071.88 × 72,133.52
  4. Step 4: Simplify right side
    171,980.96x = 18,615,633,117.42
  5. Step 5: Solve for x
    x = 18,615,633,117.42/171,980.96
  6. Step 6: Final answer
    x = 108,242.41

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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.