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Finding the Fourth Proportional to 128,575.25, 192,893.65 and 53,653.71

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Solution

The fourth proportional to 128,575.25, 192,893.65 and 53,653.71 is: 80,493.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,575.25 : 192,893.65 = 53,653.71 : x
  2. Step 2: Convert to fraction form
    128,575.25/192,893.65 = 53,653.71/x
  3. Step 3: Cross multiply
    128,575.25x = 192,893.65 × 53,653.71
  4. Step 4: Simplify right side
    128,575.25x = 10,349,459,763.93
  5. Step 5: Solve for x
    x = 10,349,459,763.93/128,575.25
  6. Step 6: Final answer
    x = 80,493.41

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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.