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Finding the Fourth Proportional to 81,620.70, 112,633.65 and 45,812.22

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Solution

The fourth proportional to 81,620.70, 112,633.65 and 45,812.22 is: 63,219.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,620.70 : 112,633.65 = 45,812.22 : x
  2. Step 2: Convert to fraction form
    81,620.70/112,633.65 = 45,812.22/x
  3. Step 3: Cross multiply
    81,620.70x = 112,633.65 × 45,812.22
  4. Step 4: Simplify right side
    81,620.70x = 5,159,997,553.20
  5. Step 5: Solve for x
    x = 5,159,997,553.20/81,620.70
  6. Step 6: Final answer
    x = 63,219.23

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1.5x scale

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.