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Finding the Fourth Proportional to 128,506.73, 192,829.82 and 53,633.40

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Solution

The fourth proportional to 128,506.73, 192,829.82 and 53,633.40 is: 80,479.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,506.73 : 192,829.82 = 53,633.40 : x
  2. Step 2: Convert to fraction form
    128,506.73/192,829.82 = 53,633.40/x
  3. Step 3: Cross multiply
    128,506.73x = 192,829.82 × 53,633.40
  4. Step 4: Simplify right side
    128,506.73x = 10,342,118,599.82
  5. Step 5: Solve for x
    x = 10,342,118,599.82/128,506.73
  6. Step 6: Final answer
    x = 80,479.20

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1.5x scale

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.