Home / 128,640.24-193,137.09-65,502.77

Finding the Fourth Proportional to 128,640.24, 193,137.09 and 65,502.77

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Solution

The fourth proportional to 128,640.24, 193,137.09 and 65,502.77 is: 98,344.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,640.24 : 193,137.09 = 65,502.77 : x
  2. Step 2: Convert to fraction form
    128,640.24/193,137.09 = 65,502.77/x
  3. Step 3: Cross multiply
    128,640.24x = 193,137.09 × 65,502.77
  4. Step 4: Simplify right side
    128,640.24x = 12,651,014,384.74
  5. Step 5: Solve for x
    x = 12,651,014,384.74/128,640.24
  6. Step 6: Final answer
    x = 98,344.14

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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.