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Finding the Fourth Proportional to 74,910.30, 112,034.79 and 66,648.30

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Solution

The fourth proportional to 74,910.30, 112,034.79 and 66,648.30 is: 99,678.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,910.30 : 112,034.79 = 66,648.30 : x
  2. Step 2: Convert to fraction form
    74,910.30/112,034.79 = 66,648.30/x
  3. Step 3: Cross multiply
    74,910.30x = 112,034.79 × 66,648.30
  4. Step 4: Simplify right side
    74,910.30x = 7,466,928,294.36
  5. Step 5: Solve for x
    x = 7,466,928,294.36/74,910.30
  6. Step 6: Final answer
    x = 99,678.26

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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.