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Finding the Fourth Proportional to 91,980.98, 126,905.22 and 53,712.92

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Solution

The fourth proportional to 91,980.98, 126,905.22 and 53,712.92 is: 74,107.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,980.98 : 126,905.22 = 53,712.92 : x
  2. Step 2: Convert to fraction form
    91,980.98/126,905.22 = 53,712.92/x
  3. Step 3: Cross multiply
    91,980.98x = 126,905.22 × 53,712.92
  4. Step 4: Simplify right side
    91,980.98x = 6,816,450,246.71
  5. Step 5: Solve for x
    x = 6,816,450,246.71/91,980.98
  6. Step 6: Final answer
    x = 74,107.17

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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.