Home / 81,768.42-113,159.43-79,801.74

Finding the Fourth Proportional to 81,768.42, 113,159.43 and 79,801.74

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Solution

The fourth proportional to 81,768.42, 113,159.43 and 79,801.74 is: 110,437.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,768.42 : 113,159.43 = 79,801.74 : x
  2. Step 2: Convert to fraction form
    81,768.42/113,159.43 = 79,801.74/x
  3. Step 3: Cross multiply
    81,768.42x = 113,159.43 × 79,801.74
  4. Step 4: Simplify right side
    81,768.42x = 9,030,319,411.41
  5. Step 5: Solve for x
    x = 9,030,319,411.41/81,768.42
  6. Step 6: Final answer
    x = 110,437.74

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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.