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Finding the Fourth Proportional to 81,700.20, 112,716.72 and 53,422.20

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Solution

The fourth proportional to 81,700.20, 112,716.72 and 53,422.20 is: 73,703.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,700.20 : 112,716.72 = 53,422.20 : x
  2. Step 2: Convert to fraction form
    81,700.20/112,716.72 = 53,422.20/x
  3. Step 3: Cross multiply
    81,700.20x = 112,716.72 × 53,422.20
  4. Step 4: Simplify right side
    81,700.20x = 6,021,575,159.18
  5. Step 5: Solve for x
    x = 6,021,575,159.18/81,700.20
  6. Step 6: Final answer
    x = 73,703.31

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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.