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Finding the Fourth Proportional to 72,852,604.80, 100,536,631.20 and 40,257,556.80

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Solution

The fourth proportional to 72,852,604.80, 100,536,631.20 and 40,257,556.80 is: 55,555,448.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,852,604.80 : 100,536,631.20 = 40,257,556.80 : x
  2. Step 2: Convert to fraction form
    72,852,604.80/100,536,631.20 = 40,257,556.80/x
  3. Step 3: Cross multiply
    72,852,604.80x = 100,536,631.20 × 40,257,556.80
  4. Step 4: Simplify right side
    72,852,604.80x = 4,047,359,141,014,652
  5. Step 5: Solve for x
    x = 4,047,359,141,014,652/72,852,604.80
  6. Step 6: Final answer
    x = 55,555,448.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.