Home / 81,719.57-112,770.40-45,420.84

Finding the Fourth Proportional to 81,719.57, 112,770.40 and 45,420.84

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Solution

The fourth proportional to 81,719.57, 112,770.40 and 45,420.84 is: 62,679.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,719.57 : 112,770.40 = 45,420.84 : x
  2. Step 2: Convert to fraction form
    81,719.57/112,770.40 = 45,420.84/x
  3. Step 3: Cross multiply
    81,719.57x = 112,770.40 × 45,420.84
  4. Step 4: Simplify right side
    81,719.57x = 5,122,125,899.66
  5. Step 5: Solve for x
    x = 5,122,125,899.66/81,719.57
  6. Step 6: Final answer
    x = 62,679.31

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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.