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Finding the Fourth Proportional to 272,509.88, 408,779.40 and 85,535.96

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Solution

The fourth proportional to 272,509.88, 408,779.40 and 85,535.96 is: 128,308.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,509.88 : 408,779.40 = 85,535.96 : x
  2. Step 2: Convert to fraction form
    272,509.88/408,779.40 = 85,535.96/x
  3. Step 3: Cross multiply
    272,509.88x = 408,779.40 × 85,535.96
  4. Step 4: Simplify right side
    272,509.88x = 34,965,336,363.33
  5. Step 5: Solve for x
    x = 34,965,336,363.33/272,509.88
  6. Step 6: Final answer
    x = 128,308.51

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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.