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Finding the Fourth Proportional to 91,708.97, 126,504.60 and 57,663.50

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Solution

The fourth proportional to 91,708.97, 126,504.60 and 57,663.50 is: 79,541.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,708.97 : 126,504.60 = 57,663.50 : x
  2. Step 2: Convert to fraction form
    91,708.97/126,504.60 = 57,663.50/x
  3. Step 3: Cross multiply
    91,708.97x = 126,504.60 × 57,663.50
  4. Step 4: Simplify right side
    91,708.97x = 7,294,697,369.58
  5. Step 5: Solve for x
    x = 7,294,697,369.58/91,708.97
  6. Step 6: Final answer
    x = 79,541.81

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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.