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Finding the Fourth Proportional to 128,510.27, 192,820.53 and 49,679.85

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Solution

The fourth proportional to 128,510.27, 192,820.53 and 49,679.85 is: 74,541.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,510.27 : 192,820.53 = 49,679.85 : x
  2. Step 2: Convert to fraction form
    128,510.27/192,820.53 = 49,679.85/x
  3. Step 3: Cross multiply
    128,510.27x = 192,820.53 × 49,679.85
  4. Step 4: Simplify right side
    128,510.27x = 9,579,295,007.32
  5. Step 5: Solve for x
    x = 9,579,295,007.32/128,510.27
  6. Step 6: Final answer
    x = 74,541.09

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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.