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Finding the Fourth Proportional to 136,614.40, 188,528.94 and 76,188.88

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Solution

The fourth proportional to 136,614.40, 188,528.94 and 76,188.88 is: 105,141.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,614.40 : 188,528.94 = 76,188.88 : x
  2. Step 2: Convert to fraction form
    136,614.40/188,528.94 = 76,188.88/x
  3. Step 3: Cross multiply
    136,614.40x = 188,528.94 × 76,188.88
  4. Step 4: Simplify right side
    136,614.40x = 14,363,808,786.19
  5. Step 5: Solve for x
    x = 14,363,808,786.19/136,614.40
  6. Step 6: Final answer
    x = 105,141.25

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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.