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Finding the Fourth Proportional to 81,495.48, 122,053.68 and 79,253.28

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Solution

The fourth proportional to 81,495.48, 122,053.68 and 79,253.28 is: 118,695.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,495.48 : 122,053.68 = 79,253.28 : x
  2. Step 2: Convert to fraction form
    81,495.48/122,053.68 = 79,253.28/x
  3. Step 3: Cross multiply
    81,495.48x = 122,053.68 × 79,253.28
  4. Step 4: Simplify right side
    81,495.48x = 9,673,154,476.07
  5. Step 5: Solve for x
    x = 9,673,154,476.07/81,495.48
  6. Step 6: Final answer
    x = 118,695.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.