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Finding the Fourth Proportional to 81,487.76, 112,460.13 and 45,684.68

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Solution

The fourth proportional to 81,487.76, 112,460.13 and 45,684.68 is: 63,048.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,487.76 : 112,460.13 = 45,684.68 : x
  2. Step 2: Convert to fraction form
    81,487.76/112,460.13 = 45,684.68/x
  3. Step 3: Cross multiply
    81,487.76x = 112,460.13 × 45,684.68
  4. Step 4: Simplify right side
    81,487.76x = 5,137,704,489.51
  5. Step 5: Solve for x
    x = 5,137,704,489.51/81,487.76
  6. Step 6: Final answer
    x = 63,048.79

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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.