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Finding the Fourth Proportional to 77,451.88, 106,840.20 and 48,760.87

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Solution

The fourth proportional to 77,451.88, 106,840.20 and 48,760.87 is: 67,262.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,451.88 : 106,840.20 = 48,760.87 : x
  2. Step 2: Convert to fraction form
    77,451.88/106,840.20 = 48,760.87/x
  3. Step 3: Cross multiply
    77,451.88x = 106,840.20 × 48,760.87
  4. Step 4: Simplify right side
    77,451.88x = 5,209,621,102.97
  5. Step 5: Solve for x
    x = 5,209,621,102.97/77,451.88
  6. Step 6: Final answer
    x = 67,262.68

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1.5x scale

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.