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Finding the Fourth Proportional to 98,392.94, 146,821.99 and 87,790.10

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Solution

The fourth proportional to 98,392.94, 146,821.99 and 87,790.10 is: 131,000.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,392.94 : 146,821.99 = 87,790.10 : x
  2. Step 2: Convert to fraction form
    98,392.94/146,821.99 = 87,790.10/x
  3. Step 3: Cross multiply
    98,392.94x = 146,821.99 × 87,790.10
  4. Step 4: Simplify right side
    98,392.94x = 12,889,517,184.30
  5. Step 5: Solve for x
    x = 12,889,517,184.30/98,392.94
  6. Step 6: Final answer
    x = 131,000.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.