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Finding the Fourth Proportional to 113,243.16, 169,728.66 and 79,913.28

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Solution

The fourth proportional to 113,243.16, 169,728.66 and 79,913.28 is: 119,773.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,243.16 : 169,728.66 = 79,913.28 : x
  2. Step 2: Convert to fraction form
    113,243.16/169,728.66 = 79,913.28/x
  3. Step 3: Cross multiply
    113,243.16x = 169,728.66 × 79,913.28
  4. Step 4: Simplify right side
    113,243.16x = 13,563,573,930.60
  5. Step 5: Solve for x
    x = 13,563,573,930.60/113,243.16
  6. Step 6: Final answer
    x = 119,773.89

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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.