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Finding the Fourth Proportional to 91,989.96, 126,957.36 and 51,705.36

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Solution

The fourth proportional to 91,989.96, 126,957.36 and 51,705.36 is: 71,359.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,989.96 : 126,957.36 = 51,705.36 : x
  2. Step 2: Convert to fraction form
    91,989.96/126,957.36 = 51,705.36/x
  3. Step 3: Cross multiply
    91,989.96x = 126,957.36 × 51,705.36
  4. Step 4: Simplify right side
    91,989.96x = 6,564,376,003.45
  5. Step 5: Solve for x
    x = 6,564,376,003.45/91,989.96
  6. Step 6: Final answer
    x = 71,359.70

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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.