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Finding the Fourth Proportional to 128,855.84, 193,125.12 and 61,423.34

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Solution

The fourth proportional to 128,855.84, 193,125.12 and 61,423.34 is: 92,059.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,855.84 : 193,125.12 = 61,423.34 : x
  2. Step 2: Convert to fraction form
    128,855.84/193,125.12 = 61,423.34/x
  3. Step 3: Cross multiply
    128,855.84x = 193,125.12 × 61,423.34
  4. Step 4: Simplify right side
    128,855.84x = 11,862,389,908.30
  5. Step 5: Solve for x
    x = 11,862,389,908.30/128,855.84
  6. Step 6: Final answer
    x = 92,059.39

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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.