Home / 72,724,891.92-109,105,611-20,909,590.80

Finding the Fourth Proportional to 72,724,891.92, 109,105,611 and 20,909,590.80

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Solution

The fourth proportional to 72,724,891.92, 109,105,611 and 20,909,590.80 is: 31,369,640.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,724,891.92 : 109,105,611 = 20,909,590.80 : x
  2. Step 2: Convert to fraction form
    72,724,891.92/109,105,611 = 20,909,590.80/x
  3. Step 3: Cross multiply
    72,724,891.92x = 109,105,611 × 20,909,590.80
  4. Step 4: Simplify right side
    72,724,891.92x = 2,281,353,679,993,979
  5. Step 5: Solve for x
    x = 2,281,353,679,993,979/72,724,891.92
  6. Step 6: Final answer
    x = 31,369,640.02

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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.