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Finding the Fourth Proportional to 78,160.56, 117,243 and 48,663.60

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Solution

The fourth proportional to 78,160.56, 117,243 and 48,663.60 is: 72,996.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,160.56 : 117,243 = 48,663.60 : x
  2. Step 2: Convert to fraction form
    78,160.56/117,243 = 48,663.60/x
  3. Step 3: Cross multiply
    78,160.56x = 117,243 × 48,663.60
  4. Step 4: Simplify right side
    78,160.56x = 5,705,466,454.80
  5. Step 5: Solve for x
    x = 5,705,466,454.80/78,160.56
  6. Step 6: Final answer
    x = 72,996.74

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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.