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Finding the Fourth Proportional to 128,645.60, 192,975.98 and 49,760.24

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Solution

The fourth proportional to 128,645.60, 192,975.98 and 49,760.24 is: 74,643.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,645.60 : 192,975.98 = 49,760.24 : x
  2. Step 2: Convert to fraction form
    128,645.60/192,975.98 = 49,760.24/x
  3. Step 3: Cross multiply
    128,645.60x = 192,975.98 × 49,760.24
  4. Step 4: Simplify right side
    128,645.60x = 9,602,531,079.04
  5. Step 5: Solve for x
    x = 9,602,531,079.04/128,645.60
  6. Step 6: Final answer
    x = 74,643.29

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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.