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Finding the Fourth Proportional to 92,021.40, 126,935.40 and 57,969.81

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Solution

The fourth proportional to 92,021.40, 126,935.40 and 57,969.81 is: 79,964.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,021.40 : 126,935.40 = 57,969.81 : x
  2. Step 2: Convert to fraction form
    92,021.40/126,935.40 = 57,969.81/x
  3. Step 3: Cross multiply
    92,021.40x = 126,935.40 × 57,969.81
  4. Step 4: Simplify right side
    92,021.40x = 7,358,421,237.66
  5. Step 5: Solve for x
    x = 7,358,421,237.66/92,021.40
  6. Step 6: Final answer
    x = 79,964.24

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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.