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Finding the Fourth Proportional to 81,437.87, 112,387.48 and 45,628.17

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Solution

The fourth proportional to 81,437.87, 112,387.48 and 45,628.17 is: 62,968.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,437.87 : 112,387.48 = 45,628.17 : x
  2. Step 2: Convert to fraction form
    81,437.87/112,387.48 = 45,628.17/x
  3. Step 3: Cross multiply
    81,437.87x = 112,387.48 × 45,628.17
  4. Step 4: Simplify right side
    81,437.87x = 5,128,034,929.24
  5. Step 5: Solve for x
    x = 5,128,034,929.24/81,437.87
  6. Step 6: Final answer
    x = 62,968.68

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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.