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Finding the Fourth Proportional to 272,565.42, 408,851.73 and 85,576.92

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Solution

The fourth proportional to 272,565.42, 408,851.73 and 85,576.92 is: 128,366.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,565.42 : 408,851.73 = 85,576.92 : x
  2. Step 2: Convert to fraction form
    272,565.42/408,851.73 = 85,576.92/x
  3. Step 3: Cross multiply
    272,565.42x = 408,851.73 × 85,576.92
  4. Step 4: Simplify right side
    272,565.42x = 34,988,271,790.07
  5. Step 5: Solve for x
    x = 34,988,271,790.07/272,565.42
  6. Step 6: Final answer
    x = 128,366.51

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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.