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Finding the Fourth Proportional to 72,381,664.80, 108,572,497.20 and 43,660,231.20

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Solution

The fourth proportional to 72,381,664.80, 108,572,497.20 and 43,660,231.20 is: 65,490,346.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,381,664.80 : 108,572,497.20 = 43,660,231.20 : x
  2. Step 2: Convert to fraction form
    72,381,664.80/108,572,497.20 = 43,660,231.20/x
  3. Step 3: Cross multiply
    72,381,664.80x = 108,572,497.20 × 43,660,231.20
  4. Step 4: Simplify right side
    72,381,664.80x = 4,740,300,329,713,353
  5. Step 5: Solve for x
    x = 4,740,300,329,713,353/72,381,664.80
  6. Step 6: Final answer
    x = 65,490,346.80

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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.