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Finding the Fourth Proportional to 98,439.78, 135,799.62 and 64,433.28

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Solution

The fourth proportional to 98,439.78, 135,799.62 and 64,433.28 is: 88,886.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,439.78 : 135,799.62 = 64,433.28 : x
  2. Step 2: Convert to fraction form
    98,439.78/135,799.62 = 64,433.28/x
  3. Step 3: Cross multiply
    98,439.78x = 135,799.62 × 64,433.28
  4. Step 4: Simplify right side
    98,439.78x = 8,750,014,939.35
  5. Step 5: Solve for x
    x = 8,750,014,939.35/98,439.78
  6. Step 6: Final answer
    x = 88,886.98

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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.