Home / 136,997.28-189,048.66-76,555.89

Finding the Fourth Proportional to 136,997.28, 189,048.66 and 76,555.89

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Solution

The fourth proportional to 136,997.28, 189,048.66 and 76,555.89 is: 105,642.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,997.28 : 189,048.66 = 76,555.89 : x
  2. Step 2: Convert to fraction form
    136,997.28/189,048.66 = 76,555.89/x
  3. Step 3: Cross multiply
    136,997.28x = 189,048.66 × 76,555.89
  4. Step 4: Simplify right side
    136,997.28x = 14,472,788,419.61
  5. Step 5: Solve for x
    x = 14,472,788,419.61/136,997.28
  6. Step 6: Final answer
    x = 105,642.89

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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.