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Finding the Fourth Proportional to 228,018, 342,031.86 and 78,257.64

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Solution

The fourth proportional to 228,018, 342,031.86 and 78,257.64 is: 117,388.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,018 : 342,031.86 = 78,257.64 : x
  2. Step 2: Convert to fraction form
    228,018/342,031.86 = 78,257.64/x
  3. Step 3: Cross multiply
    228,018x = 342,031.86 × 78,257.64
  4. Step 4: Simplify right side
    228,018x = 26,766,606,168.41
  5. Step 5: Solve for x
    x = 26,766,606,168.41/228,018
  6. Step 6: Final answer
    x = 117,388.13

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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.