Home / 128,930.34-193,395.25-72,744.95

Finding the Fourth Proportional to 128,930.34, 193,395.25 and 72,744.95

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Solution

The fourth proportional to 128,930.34, 193,395.25 and 72,744.95 is: 109,117.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,930.34 : 193,395.25 = 72,744.95 : x
  2. Step 2: Convert to fraction form
    128,930.34/193,395.25 = 72,744.95/x
  3. Step 3: Cross multiply
    128,930.34x = 193,395.25 × 72,744.95
  4. Step 4: Simplify right side
    128,930.34x = 14,068,527,791.49
  5. Step 5: Solve for x
    x = 14,068,527,791.49/128,930.34
  6. Step 6: Final answer
    x = 109,117.28

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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.