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Finding the Fourth Proportional to 81,203.72, 112,063.44 and 45,397.76

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Solution

The fourth proportional to 81,203.72, 112,063.44 and 45,397.76 is: 62,650.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,203.72 : 112,063.44 = 45,397.76 : x
  2. Step 2: Convert to fraction form
    81,203.72/112,063.44 = 45,397.76/x
  3. Step 3: Cross multiply
    81,203.72x = 112,063.44 × 45,397.76
  4. Step 4: Simplify right side
    81,203.72x = 5,087,429,153.89
  5. Step 5: Solve for x
    x = 5,087,429,153.89/81,203.72
  6. Step 6: Final answer
    x = 62,650.20

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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.