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Finding the Fourth Proportional to 136,471.88, 188,325.54 and 76,039.40

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Solution

The fourth proportional to 136,471.88, 188,325.54 and 76,039.40 is: 104,931.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,471.88 : 188,325.54 = 76,039.40 : x
  2. Step 2: Convert to fraction form
    136,471.88/188,325.54 = 76,039.40/x
  3. Step 3: Cross multiply
    136,471.88x = 188,325.54 × 76,039.40
  4. Step 4: Simplify right side
    136,471.88x = 14,320,161,066.28
  5. Step 5: Solve for x
    x = 14,320,161,066.28/136,471.88
  6. Step 6: Final answer
    x = 104,931.22

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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.