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Finding the Fourth Proportional to 136,407.92, 188,271.98 and 91,670

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Solution

The fourth proportional to 136,407.92, 188,271.98 and 91,670 is: 126,524.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,407.92 : 188,271.98 = 91,670 : x
  2. Step 2: Convert to fraction form
    136,407.92/188,271.98 = 91,670/x
  3. Step 3: Cross multiply
    136,407.92x = 188,271.98 × 91,670
  4. Step 4: Simplify right side
    136,407.92x = 17,258,892,406.60
  5. Step 5: Solve for x
    x = 17,258,892,406.60/136,407.92
  6. Step 6: Final answer
    x = 126,524.12

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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.