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Finding the Fourth Proportional to 136,459.80, 188,328.39 and 76,040.28

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Solution

The fourth proportional to 136,459.80, 188,328.39 and 76,040.28 is: 104,943.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,459.80 : 188,328.39 = 76,040.28 : x
  2. Step 2: Convert to fraction form
    136,459.80/188,328.39 = 76,040.28/x
  3. Step 3: Cross multiply
    136,459.80x = 188,328.39 × 76,040.28
  4. Step 4: Simplify right side
    136,459.80x = 14,320,543,507.55
  5. Step 5: Solve for x
    x = 14,320,543,507.55/136,459.80
  6. Step 6: Final answer
    x = 104,943.31

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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.