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Finding the Fourth Proportional to 392,030.92, 587,991 and 125,756.86

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Solution

The fourth proportional to 392,030.92, 587,991 and 125,756.86 is: 188,617.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,030.92 : 587,991 = 125,756.86 : x
  2. Step 2: Convert to fraction form
    392,030.92/587,991 = 125,756.86/x
  3. Step 3: Cross multiply
    392,030.92x = 587,991 × 125,756.86
  4. Step 4: Simplify right side
    392,030.92x = 73,943,901,868.26
  5. Step 5: Solve for x
    x = 73,943,901,868.26/392,030.92
  6. Step 6: Final answer
    x = 188,617.53

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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.