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Finding the Fourth Proportional to 128,437.52, 192,574.22 and 61,744.94

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Solution

The fourth proportional to 128,437.52, 192,574.22 and 61,744.94 is: 92,577.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,437.52 : 192,574.22 = 61,744.94 : x
  2. Step 2: Convert to fraction form
    128,437.52/192,574.22 = 61,744.94/x
  3. Step 3: Cross multiply
    128,437.52x = 192,574.22 × 61,744.94
  4. Step 4: Simplify right side
    128,437.52x = 11,890,483,659.45
  5. Step 5: Solve for x
    x = 11,890,483,659.45/128,437.52
  6. Step 6: Final answer
    x = 92,577.96

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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.