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Finding the Fourth Proportional to 90,879.46, 125,462.86 and 63,738.88

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Solution

The fourth proportional to 90,879.46, 125,462.86 and 63,738.88 is: 87,994.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,879.46 : 125,462.86 = 63,738.88 : x
  2. Step 2: Convert to fraction form
    90,879.46/125,462.86 = 63,738.88/x
  3. Step 3: Cross multiply
    90,879.46x = 125,462.86 × 63,738.88
  4. Step 4: Simplify right side
    90,879.46x = 7,996,862,178.00
  5. Step 5: Solve for x
    x = 7,996,862,178.00/90,879.46
  6. Step 6: Final answer
    x = 87,994.16

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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.