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Finding the Fourth Proportional to 128,445.88, 192,724.17 and 53,580.77

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Solution

The fourth proportional to 128,445.88, 192,724.17 and 53,580.77 is: 80,394.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,445.88 : 192,724.17 = 53,580.77 : x
  2. Step 2: Convert to fraction form
    128,445.88/192,724.17 = 53,580.77/x
  3. Step 3: Cross multiply
    128,445.88x = 192,724.17 × 53,580.77
  4. Step 4: Simplify right side
    128,445.88x = 10,326,309,426.21
  5. Step 5: Solve for x
    x = 10,326,309,426.21/128,445.88
  6. Step 6: Final answer
    x = 80,394.24

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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.