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Finding the Fourth Proportional to 127,993.86, 176,617.53 and 90,202.50

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Solution

The fourth proportional to 127,993.86, 176,617.53 and 90,202.50 is: 124,469.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,993.86 : 176,617.53 = 90,202.50 : x
  2. Step 2: Convert to fraction form
    127,993.86/176,617.53 = 90,202.50/x
  3. Step 3: Cross multiply
    127,993.86x = 176,617.53 × 90,202.50
  4. Step 4: Simplify right side
    127,993.86x = 15,931,342,749.83
  5. Step 5: Solve for x
    x = 15,931,342,749.83/127,993.86
  6. Step 6: Final answer
    x = 124,469.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.