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Finding the Fourth Proportional to 136,639.68, 188,614.80 and 102,746.64

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Solution

The fourth proportional to 136,639.68, 188,614.80 and 102,746.64 is: 141,829.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,639.68 : 188,614.80 = 102,746.64 : x
  2. Step 2: Convert to fraction form
    136,639.68/188,614.80 = 102,746.64/x
  3. Step 3: Cross multiply
    136,639.68x = 188,614.80 × 102,746.64
  4. Step 4: Simplify right side
    136,639.68x = 19,379,536,954.27
  5. Step 5: Solve for x
    x = 19,379,536,954.27/136,639.68
  6. Step 6: Final answer
    x = 141,829.50

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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.