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Finding the Fourth Proportional to 228,245.08, 342,300.70 and 85,987.72

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Solution

The fourth proportional to 228,245.08, 342,300.70 and 85,987.72 is: 128,956.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,245.08 : 342,300.70 = 85,987.72 : x
  2. Step 2: Convert to fraction form
    228,245.08/342,300.70 = 85,987.72/x
  3. Step 3: Cross multiply
    228,245.08x = 342,300.70 × 85,987.72
  4. Step 4: Simplify right side
    228,245.08x = 29,433,656,747.40
  5. Step 5: Solve for x
    x = 29,433,656,747.40/228,245.08
  6. Step 6: Final answer
    x = 128,956.37

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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.