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Finding the Fourth Proportional to 81,700.70, 112,717.41 and 53,422.70

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Solution

The fourth proportional to 81,700.70, 112,717.41 and 53,422.70 is: 73,704.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,700.70 : 112,717.41 = 53,422.70 : x
  2. Step 2: Convert to fraction form
    81,700.70/112,717.41 = 53,422.70/x
  3. Step 3: Cross multiply
    81,700.70x = 112,717.41 × 53,422.70
  4. Step 4: Simplify right side
    81,700.70x = 6,021,668,379.21
  5. Step 5: Solve for x
    x = 6,021,668,379.21/81,700.70
  6. Step 6: Final answer
    x = 73,704.00

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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.