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Finding the Fourth Proportional to 272,615.54, 408,967.70 and 80,509.40

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Solution

The fourth proportional to 272,615.54, 408,967.70 and 80,509.40 is: 120,777.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,615.54 : 408,967.70 = 80,509.40 : x
  2. Step 2: Convert to fraction form
    272,615.54/408,967.70 = 80,509.40/x
  3. Step 3: Cross multiply
    272,615.54x = 408,967.70 × 80,509.40
  4. Step 4: Simplify right side
    272,615.54x = 32,925,744,146.38
  5. Step 5: Solve for x
    x = 32,925,744,146.38/272,615.54
  6. Step 6: Final answer
    x = 120,777.21

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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.