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Finding the Fourth Proportional to 98,380.71, 135,762.48 and 55,362.69

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Solution

The fourth proportional to 98,380.71, 135,762.48 and 55,362.69 is: 76,398.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,380.71 : 135,762.48 = 55,362.69 : x
  2. Step 2: Convert to fraction form
    98,380.71/135,762.48 = 55,362.69/x
  3. Step 3: Cross multiply
    98,380.71x = 135,762.48 × 55,362.69
  4. Step 4: Simplify right side
    98,380.71x = 7,516,176,093.87
  5. Step 5: Solve for x
    x = 7,516,176,093.87/98,380.71
  6. Step 6: Final answer
    x = 76,398.88

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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.