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Finding the Fourth Proportional to 136,885.42, 188,899.88 and 76,456.92

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Solution

The fourth proportional to 136,885.42, 188,899.88 and 76,456.92 is: 105,509.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,885.42 : 188,899.88 = 76,456.92 : x
  2. Step 2: Convert to fraction form
    136,885.42/188,899.88 = 76,456.92/x
  3. Step 3: Cross multiply
    136,885.42x = 188,899.88 × 76,456.92
  4. Step 4: Simplify right side
    136,885.42x = 14,442,703,204.31
  5. Step 5: Solve for x
    x = 14,442,703,204.31/136,885.42
  6. Step 6: Final answer
    x = 105,509.44

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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.