Home / 128,447.40-192,704.70-49,564.20

Finding the Fourth Proportional to 128,447.40, 192,704.70 and 49,564.20

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Solution

The fourth proportional to 128,447.40, 192,704.70 and 49,564.20 is: 74,359.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,447.40 : 192,704.70 = 49,564.20 : x
  2. Step 2: Convert to fraction form
    128,447.40/192,704.70 = 49,564.20/x
  3. Step 3: Cross multiply
    128,447.40x = 192,704.70 × 49,564.20
  4. Step 4: Simplify right side
    128,447.40x = 9,551,254,291.74
  5. Step 5: Solve for x
    x = 9,551,254,291.74/128,447.40
  6. Step 6: Final answer
    x = 74,359.27

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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.