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Finding the Fourth Proportional to 72,509,140.80, 108,763,711.20 and 29,379,751.20

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Solution

The fourth proportional to 72,509,140.80, 108,763,711.20 and 29,379,751.20 is: 44,069,626.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,509,140.80 : 108,763,711.20 = 29,379,751.20 : x
  2. Step 2: Convert to fraction form
    72,509,140.80/108,763,711.20 = 29,379,751.20/x
  3. Step 3: Cross multiply
    72,509,140.80x = 108,763,711.20 × 29,379,751.20
  4. Step 4: Simplify right side
    72,509,140.80x = 3,195,450,774,644,653.50
  5. Step 5: Solve for x
    x = 3,195,450,774,644,653.50/72,509,140.80
  6. Step 6: Final answer
    x = 44,069,626.80

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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.