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Finding the Fourth Proportional to 72,979,362.40, 109,455,046.80 and 21,863,048.80

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Solution

The fourth proportional to 72,979,362.40, 109,455,046.80 and 21,863,048.80 is: 32,790,380.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,979,362.40 : 109,455,046.80 = 21,863,048.80 : x
  2. Step 2: Convert to fraction form
    72,979,362.40/109,455,046.80 = 21,863,048.80/x
  3. Step 3: Cross multiply
    72,979,362.40x = 109,455,046.80 × 21,863,048.80
  4. Step 4: Simplify right side
    72,979,362.40x = 2,393,021,029,594,684
  5. Step 5: Solve for x
    x = 2,393,021,029,594,684/72,979,362.40
  6. Step 6: Final answer
    x = 32,790,380.06

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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.