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Finding the Fourth Proportional to 81,709.47, 112,752.90 and 45,892.47

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Solution

The fourth proportional to 81,709.47, 112,752.90 and 45,892.47 is: 63,328.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,709.47 : 112,752.90 = 45,892.47 : x
  2. Step 2: Convert to fraction form
    81,709.47/112,752.90 = 45,892.47/x
  3. Step 3: Cross multiply
    81,709.47x = 112,752.90 × 45,892.47
  4. Step 4: Simplify right side
    81,709.47x = 5,174,509,080.66
  5. Step 5: Solve for x
    x = 5,174,509,080.66/81,709.47
  6. Step 6: Final answer
    x = 63,328.14

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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.