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Finding the Fourth Proportional to 78,398.73, 117,445.01 and 62,636.54

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Solution

The fourth proportional to 78,398.73, 117,445.01 and 62,636.54 is: 93,832.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,398.73 : 117,445.01 = 62,636.54 : x
  2. Step 2: Convert to fraction form
    78,398.73/117,445.01 = 62,636.54/x
  3. Step 3: Cross multiply
    78,398.73x = 117,445.01 × 62,636.54
  4. Step 4: Simplify right side
    78,398.73x = 7,356,348,166.26
  5. Step 5: Solve for x
    x = 7,356,348,166.26/78,398.73
  6. Step 6: Final answer
    x = 93,832.49

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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.