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Finding the Fourth Proportional to 272,570.63, 408,872.34 and 85,582.13

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Solution

The fourth proportional to 272,570.63, 408,872.34 and 85,582.13 is: 128,378.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,570.63 : 408,872.34 = 85,582.13 : x
  2. Step 2: Convert to fraction form
    272,570.63/408,872.34 = 85,582.13/x
  3. Step 3: Cross multiply
    272,570.63x = 408,872.34 × 85,582.13
  4. Step 4: Simplify right side
    272,570.63x = 34,992,163,710.92
  5. Step 5: Solve for x
    x = 34,992,163,710.92/272,570.63
  6. Step 6: Final answer
    x = 128,378.34

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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.