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Finding the Fourth Proportional to 80,356.82, 120,555.30 and 56,710.53

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Solution

The fourth proportional to 80,356.82, 120,555.30 and 56,710.53 is: 85,079.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,356.82 : 120,555.30 = 56,710.53 : x
  2. Step 2: Convert to fraction form
    80,356.82/120,555.30 = 56,710.53/x
  3. Step 3: Cross multiply
    80,356.82x = 120,555.30 × 56,710.53
  4. Step 4: Simplify right side
    80,356.82x = 6,836,754,957.31
  5. Step 5: Solve for x
    x = 6,836,754,957.31/80,356.82
  6. Step 6: Final answer
    x = 85,079.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.