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Finding the Fourth Proportional to 136,877.92, 188,889.54 and 76,449.42

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Solution

The fourth proportional to 136,877.92, 188,889.54 and 76,449.42 is: 105,499.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,877.92 : 188,889.54 = 76,449.42 : x
  2. Step 2: Convert to fraction form
    136,877.92/188,889.54 = 76,449.42/x
  3. Step 3: Cross multiply
    136,877.92x = 188,889.54 × 76,449.42
  4. Step 4: Simplify right side
    136,877.92x = 14,440,495,490.38
  5. Step 5: Solve for x
    x = 14,440,495,490.38/136,877.92
  6. Step 6: Final answer
    x = 105,499.09

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1.5x scale

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.