Home / 128,920.79-193,380.59-40,174.35

Finding the Fourth Proportional to 128,920.79, 193,380.59 and 40,174.35

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Solution

The fourth proportional to 128,920.79, 193,380.59 and 40,174.35 is: 60,261.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,920.79 : 193,380.59 = 40,174.35 : x
  2. Step 2: Convert to fraction form
    128,920.79/193,380.59 = 40,174.35/x
  3. Step 3: Cross multiply
    128,920.79x = 193,380.59 × 40,174.35
  4. Step 4: Simplify right side
    128,920.79x = 7,768,939,304.99
  5. Step 5: Solve for x
    x = 7,768,939,304.99/128,920.79
  6. Step 6: Final answer
    x = 60,261.34

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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.