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Finding the Fourth Proportional to 91,999.92, 126,957 and 51,712.68

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Solution

The fourth proportional to 91,999.92, 126,957 and 51,712.68 is: 71,361.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,999.92 : 126,957 = 51,712.68 : x
  2. Step 2: Convert to fraction form
    91,999.92/126,957 = 51,712.68/x
  3. Step 3: Cross multiply
    91,999.92x = 126,957 × 51,712.68
  4. Step 4: Simplify right side
    91,999.92x = 6,565,286,714.76
  5. Step 5: Solve for x
    x = 6,565,286,714.76/91,999.92
  6. Step 6: Final answer
    x = 71,361.87

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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.