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Finding the Fourth Proportional to 128,447.88, 192,727.18 and 53,582.76

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Solution

The fourth proportional to 128,447.88, 192,727.18 and 53,582.76 is: 80,397.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,447.88 : 192,727.18 = 53,582.76 : x
  2. Step 2: Convert to fraction form
    128,447.88/192,727.18 = 53,582.76/x
  3. Step 3: Cross multiply
    128,447.88x = 192,727.18 × 53,582.76
  4. Step 4: Simplify right side
    128,447.88x = 10,326,854,231.42
  5. Step 5: Solve for x
    x = 10,326,854,231.42/128,447.88
  6. Step 6: Final answer
    x = 80,397.23

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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.