Home / 128,215.44-192,303.72-45,090

Finding the Fourth Proportional to 128,215.44, 192,303.72 and 45,090

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Solution

The fourth proportional to 128,215.44, 192,303.72 and 45,090 is: 67,628.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,215.44 : 192,303.72 = 45,090 : x
  2. Step 2: Convert to fraction form
    128,215.44/192,303.72 = 45,090/x
  3. Step 3: Cross multiply
    128,215.44x = 192,303.72 × 45,090
  4. Step 4: Simplify right side
    128,215.44x = 8,670,974,734.80
  5. Step 5: Solve for x
    x = 8,670,974,734.80/128,215.44
  6. Step 6: Final answer
    x = 67,628.16

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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.