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Finding the Fourth Proportional to 81,495.20, 112,461.21 and 45,687.53

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Solution

The fourth proportional to 81,495.20, 112,461.21 and 45,687.53 is: 63,047.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,495.20 : 112,461.21 = 45,687.53 : x
  2. Step 2: Convert to fraction form
    81,495.20/112,461.21 = 45,687.53/x
  3. Step 3: Cross multiply
    81,495.20x = 112,461.21 × 45,687.53
  4. Step 4: Simplify right side
    81,495.20x = 5,138,074,905.71
  5. Step 5: Solve for x
    x = 5,138,074,905.71/81,495.20
  6. Step 6: Final answer
    x = 63,047.58

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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.