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Finding the Fourth Proportional to 71,495.72, 98,659.60 and 39,663.96

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Solution

The fourth proportional to 71,495.72, 98,659.60 and 39,663.96 is: 54,733.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,495.72 : 98,659.60 = 39,663.96 : x
  2. Step 2: Convert to fraction form
    71,495.72/98,659.60 = 39,663.96/x
  3. Step 3: Cross multiply
    71,495.72x = 98,659.60 × 39,663.96
  4. Step 4: Simplify right side
    71,495.72x = 3,913,230,428.02
  5. Step 5: Solve for x
    x = 3,913,230,428.02/71,495.72
  6. Step 6: Final answer
    x = 54,733.77

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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.