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Finding the Fourth Proportional to 78,440.64, 117,548.64 and 60,828

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Solution

The fourth proportional to 78,440.64, 117,548.64 and 60,828 is: 91,154.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,440.64 : 117,548.64 = 60,828 : x
  2. Step 2: Convert to fraction form
    78,440.64/117,548.64 = 60,828/x
  3. Step 3: Cross multiply
    78,440.64x = 117,548.64 × 60,828
  4. Step 4: Simplify right side
    78,440.64x = 7,150,248,673.92
  5. Step 5: Solve for x
    x = 7,150,248,673.92/78,440.64
  6. Step 6: Final answer
    x = 91,154.90

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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.