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Finding the Fourth Proportional to 128,445.88, 192,724.18 and 53,580.76

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Solution

The fourth proportional to 128,445.88, 192,724.18 and 53,580.76 is: 80,394.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,445.88 : 192,724.18 = 53,580.76 : x
  2. Step 2: Convert to fraction form
    128,445.88/192,724.18 = 53,580.76/x
  3. Step 3: Cross multiply
    128,445.88x = 192,724.18 × 53,580.76
  4. Step 4: Simplify right side
    128,445.88x = 10,326,308,034.78
  5. Step 5: Solve for x
    x = 10,326,308,034.78/128,445.88
  6. Step 6: Final answer
    x = 80,394.23

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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.