Home / 128,828.12-193,109.90-53,991.71

Finding the Fourth Proportional to 128,828.12, 193,109.90 and 53,991.71

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Solution

The fourth proportional to 128,828.12, 193,109.90 and 53,991.71 is: 80,932.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,828.12 : 193,109.90 = 53,991.71 : x
  2. Step 2: Convert to fraction form
    128,828.12/193,109.90 = 53,991.71/x
  3. Step 3: Cross multiply
    128,828.12x = 193,109.90 × 53,991.71
  4. Step 4: Simplify right side
    128,828.12x = 10,426,334,445.68
  5. Step 5: Solve for x
    x = 10,426,334,445.68/128,828.12
  6. Step 6: Final answer
    x = 80,932.13

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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.