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Finding the Fourth Proportional to 81,616.76, 112,636.50 and 45,809.19

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Solution

The fourth proportional to 81,616.76, 112,636.50 and 45,809.19 is: 63,219.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,616.76 : 112,636.50 = 45,809.19 : x
  2. Step 2: Convert to fraction form
    81,616.76/112,636.50 = 45,809.19/x
  3. Step 3: Cross multiply
    81,616.76x = 112,636.50 × 45,809.19
  4. Step 4: Simplify right side
    81,616.76x = 5,159,786,829.44
  5. Step 5: Solve for x
    x = 5,159,786,829.44/81,616.76
  6. Step 6: Final answer
    x = 63,219.70

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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.