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Finding the Fourth Proportional to 128,348.76, 192,362.63 and 61,771.08

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Solution

The fourth proportional to 128,348.76, 192,362.63 and 61,771.08 is: 92,579.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,348.76 : 192,362.63 = 61,771.08 : x
  2. Step 2: Convert to fraction form
    128,348.76/192,362.63 = 61,771.08/x
  3. Step 3: Cross multiply
    128,348.76x = 192,362.63 × 61,771.08
  4. Step 4: Simplify right side
    128,348.76x = 11,882,447,097.89
  5. Step 5: Solve for x
    x = 11,882,447,097.89/128,348.76
  6. Step 6: Final answer
    x = 92,579.37

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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.