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Finding the Fourth Proportional to 128,528.83, 192,826.51 and 75,265.82

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Solution

The fourth proportional to 128,528.83, 192,826.51 and 75,265.82 is: 112,918.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,528.83 : 192,826.51 = 75,265.82 : x
  2. Step 2: Convert to fraction form
    128,528.83/192,826.51 = 75,265.82/x
  3. Step 3: Cross multiply
    128,528.83x = 192,826.51 × 75,265.82
  4. Step 4: Simplify right side
    128,528.83x = 14,513,245,392.89
  5. Step 5: Solve for x
    x = 14,513,245,392.89/128,528.83
  6. Step 6: Final answer
    x = 112,918.21

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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.