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Finding the Fourth Proportional to 136,457.74, 188,311.21 and 76,029.11

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Solution

The fourth proportional to 136,457.74, 188,311.21 and 76,029.11 is: 104,919.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,457.74 : 188,311.21 = 76,029.11 : x
  2. Step 2: Convert to fraction form
    136,457.74/188,311.21 = 76,029.11/x
  3. Step 3: Cross multiply
    136,457.74x = 188,311.21 × 76,029.11
  4. Step 4: Simplify right side
    136,457.74x = 14,317,133,699.32
  5. Step 5: Solve for x
    x = 14,317,133,699.32/136,457.74
  6. Step 6: Final answer
    x = 104,919.91

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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.