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Finding the Fourth Proportional to 98,433.40, 147,431.40 and 80,937.40

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Solution

The fourth proportional to 98,433.40, 147,431.40 and 80,937.40 is: 121,226.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,433.40 : 147,431.40 = 80,937.40 : x
  2. Step 2: Convert to fraction form
    98,433.40/147,431.40 = 80,937.40/x
  3. Step 3: Cross multiply
    98,433.40x = 147,431.40 × 80,937.40
  4. Step 4: Simplify right side
    98,433.40x = 11,932,714,194.36
  5. Step 5: Solve for x
    x = 11,932,714,194.36/98,433.40
  6. Step 6: Final answer
    x = 121,226.27

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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.