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Finding the Fourth Proportional to 136,493.36, 188,288.88 and 93,978.08

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Solution

The fourth proportional to 136,493.36, 188,288.88 and 93,978.08 is: 129,640.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,493.36 : 188,288.88 = 93,978.08 : x
  2. Step 2: Convert to fraction form
    136,493.36/188,288.88 = 93,978.08/x
  3. Step 3: Cross multiply
    136,493.36x = 188,288.88 × 93,978.08
  4. Step 4: Simplify right side
    136,493.36x = 17,695,027,427.75
  5. Step 5: Solve for x
    x = 17,695,027,427.75/136,493.36
  6. Step 6: Final answer
    x = 129,640.21

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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.