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Finding the Fourth Proportional to 98,425.40, 147,815.92 and 90,513.32

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Solution

The fourth proportional to 98,425.40, 147,815.92 and 90,513.32 is: 135,933.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,425.40 : 147,815.92 = 90,513.32 : x
  2. Step 2: Convert to fraction form
    98,425.40/147,815.92 = 90,513.32/x
  3. Step 3: Cross multiply
    98,425.40x = 147,815.92 × 90,513.32
  4. Step 4: Simplify right side
    98,425.40x = 13,379,309,042.12
  5. Step 5: Solve for x
    x = 13,379,309,042.12/98,425.40
  6. Step 6: Final answer
    x = 135,933.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.