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Finding the Fourth Proportional to 81,052.70, 121,521.45 and 36,700.70

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Solution

The fourth proportional to 81,052.70, 121,521.45 and 36,700.70 is: 55,024.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,052.70 : 121,521.45 = 36,700.70 : x
  2. Step 2: Convert to fraction form
    81,052.70/121,521.45 = 36,700.70/x
  3. Step 3: Cross multiply
    81,052.70x = 121,521.45 × 36,700.70
  4. Step 4: Simplify right side
    81,052.70x = 4,459,922,280.02
  5. Step 5: Solve for x
    x = 4,459,922,280.02/81,052.70
  6. Step 6: Final answer
    x = 55,024.97

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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.