Home / 128,989.98-193,559.69-54,103.46

Finding the Fourth Proportional to 128,989.98, 193,559.69 and 54,103.46

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Solution

The fourth proportional to 128,989.98, 193,559.69 and 54,103.46 is: 81,186.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,989.98 : 193,559.69 = 54,103.46 : x
  2. Step 2: Convert to fraction form
    128,989.98/193,559.69 = 54,103.46/x
  3. Step 3: Cross multiply
    128,989.98x = 193,559.69 × 54,103.46
  4. Step 4: Simplify right side
    128,989.98x = 10,472,248,112.99
  5. Step 5: Solve for x
    x = 10,472,248,112.99/128,989.98
  6. Step 6: Final answer
    x = 81,186.52

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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.