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Finding the Fourth Proportional to 85,388.76, 117,836.37 and 47,663.01

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Solution

The fourth proportional to 85,388.76, 117,836.37 and 47,663.01 is: 65,774.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,388.76 : 117,836.37 = 47,663.01 : x
  2. Step 2: Convert to fraction form
    85,388.76/117,836.37 = 47,663.01/x
  3. Step 3: Cross multiply
    85,388.76x = 117,836.37 × 47,663.01
  4. Step 4: Simplify right side
    85,388.76x = 5,616,436,081.67
  5. Step 5: Solve for x
    x = 5,616,436,081.67/85,388.76
  6. Step 6: Final answer
    x = 65,774.89

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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.