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Finding the Fourth Proportional to 228,143.66, 342,263.68 and 85,985.92

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Solution

The fourth proportional to 228,143.66, 342,263.68 and 85,985.92 is: 128,997.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,143.66 : 342,263.68 = 85,985.92 : x
  2. Step 2: Convert to fraction form
    228,143.66/342,263.68 = 85,985.92/x
  3. Step 3: Cross multiply
    228,143.66x = 342,263.68 × 85,985.92
  4. Step 4: Simplify right side
    228,143.66x = 29,429,857,620.25
  5. Step 5: Solve for x
    x = 29,429,857,620.25/228,143.66
  6. Step 6: Final answer
    x = 128,997.05

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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.