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Finding the Fourth Proportional to 99,959.52, 137,889.54 and 64,109.64

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Solution

The fourth proportional to 99,959.52, 137,889.54 and 64,109.64 is: 88,436.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,959.52 : 137,889.54 = 64,109.64 : x
  2. Step 2: Convert to fraction form
    99,959.52/137,889.54 = 64,109.64/x
  3. Step 3: Cross multiply
    99,959.52x = 137,889.54 × 64,109.64
  4. Step 4: Simplify right side
    99,959.52x = 8,840,048,769.17
  5. Step 5: Solve for x
    x = 8,840,048,769.17/99,959.52
  6. Step 6: Final answer
    x = 88,436.29

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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.