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Finding the Fourth Proportional to 98,426.43, 135,832.89 and 55,420.71

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Solution

The fourth proportional to 98,426.43, 135,832.89 and 55,420.71 is: 76,483.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,426.43 : 135,832.89 = 55,420.71 : x
  2. Step 2: Convert to fraction form
    98,426.43/135,832.89 = 55,420.71/x
  3. Step 3: Cross multiply
    98,426.43x = 135,832.89 × 55,420.71
  4. Step 4: Simplify right side
    98,426.43x = 7,527,955,205.15
  5. Step 5: Solve for x
    x = 7,527,955,205.15/98,426.43
  6. Step 6: Final answer
    x = 76,483.07

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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.