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Finding the Fourth Proportional to 77,604.64, 116,441.52 and 40,660

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Solution

The fourth proportional to 77,604.64, 116,441.52 and 40,660 is: 61,008.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,604.64 : 116,441.52 = 40,660 : x
  2. Step 2: Convert to fraction form
    77,604.64/116,441.52 = 40,660/x
  3. Step 3: Cross multiply
    77,604.64x = 116,441.52 × 40,660
  4. Step 4: Simplify right side
    77,604.64x = 4,734,512,203.20
  5. Step 5: Solve for x
    x = 4,734,512,203.20/77,604.64
  6. Step 6: Final answer
    x = 61,008.11

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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.