Home / 128,411.24-192,242.10-74,939.36

Finding the Fourth Proportional to 128,411.24, 192,242.10 and 74,939.36

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Solution

The fourth proportional to 128,411.24, 192,242.10 and 74,939.36 is: 112,190.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,411.24 : 192,242.10 = 74,939.36 : x
  2. Step 2: Convert to fraction form
    128,411.24/192,242.10 = 74,939.36/x
  3. Step 3: Cross multiply
    128,411.24x = 192,242.10 × 74,939.36
  4. Step 4: Simplify right side
    128,411.24x = 14,406,499,939.06
  5. Step 5: Solve for x
    x = 14,406,499,939.06/128,411.24
  6. Step 6: Final answer
    x = 112,190.33

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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.