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Finding the Fourth Proportional to 72,578,857.20, 108,868,285.80 and 29,468,713.20

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Solution

The fourth proportional to 72,578,857.20, 108,868,285.80 and 29,468,713.20 is: 44,203,069.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,578,857.20 : 108,868,285.80 = 29,468,713.20 : x
  2. Step 2: Convert to fraction form
    72,578,857.20/108,868,285.80 = 29,468,713.20/x
  3. Step 3: Cross multiply
    72,578,857.20x = 108,868,285.80 × 29,468,713.20
  4. Step 4: Simplify right side
    72,578,857.20x = 3,208,208,290,815,832.50
  5. Step 5: Solve for x
    x = 3,208,208,290,815,832.50/72,578,857.20
  6. Step 6: Final answer
    x = 44,203,069.80

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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.