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Finding the Fourth Proportional to 81,014.40, 121,521.60 and 56,082.60

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Solution

The fourth proportional to 81,014.40, 121,521.60 and 56,082.60 is: 84,123.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,014.40 : 121,521.60 = 56,082.60 : x
  2. Step 2: Convert to fraction form
    81,014.40/121,521.60 = 56,082.60/x
  3. Step 3: Cross multiply
    81,014.40x = 121,521.60 × 56,082.60
  4. Step 4: Simplify right side
    81,014.40x = 6,815,247,284.16
  5. Step 5: Solve for x
    x = 6,815,247,284.16/81,014.40
  6. Step 6: Final answer
    x = 84,123.90

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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.