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Finding the Fourth Proportional to 98,520.88, 135,958.97 and 56,079.41

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Solution

The fourth proportional to 98,520.88, 135,958.97 and 56,079.41 is: 77,389.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,520.88 : 135,958.97 = 56,079.41 : x
  2. Step 2: Convert to fraction form
    98,520.88/135,958.97 = 56,079.41/x
  3. Step 3: Cross multiply
    98,520.88x = 135,958.97 × 56,079.41
  4. Step 4: Simplify right side
    98,520.88x = 7,624,498,541.41
  5. Step 5: Solve for x
    x = 7,624,498,541.41/98,520.88
  6. Step 6: Final answer
    x = 77,389.68

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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.