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Finding the Fourth Proportional to 135,064.76, 202,533.54 and 78,921.06

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Solution

The fourth proportional to 135,064.76, 202,533.54 and 78,921.06 is: 118,344.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,064.76 : 202,533.54 = 78,921.06 : x
  2. Step 2: Convert to fraction form
    135,064.76/202,533.54 = 78,921.06/x
  3. Step 3: Cross multiply
    135,064.76x = 202,533.54 × 78,921.06
  4. Step 4: Simplify right side
    135,064.76x = 15,984,161,662.35
  5. Step 5: Solve for x
    x = 15,984,161,662.35/135,064.76
  6. Step 6: Final answer
    x = 118,344.43

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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.