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Finding the Fourth Proportional to 77,310.80, 116,004.60 and 30,565.20

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Solution

The fourth proportional to 77,310.80, 116,004.60 and 30,565.20 is: 45,862.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,310.80 : 116,004.60 = 30,565.20 : x
  2. Step 2: Convert to fraction form
    77,310.80/116,004.60 = 30,565.20/x
  3. Step 3: Cross multiply
    77,310.80x = 116,004.60 × 30,565.20
  4. Step 4: Simplify right side
    77,310.80x = 3,545,703,799.92
  5. Step 5: Solve for x
    x = 3,545,703,799.92/77,310.80
  6. Step 6: Final answer
    x = 45,862.98

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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.