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Finding the Fourth Proportional to 72,171,061.80, 108,256,592.70 and 49,212,810.60

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Solution

The fourth proportional to 72,171,061.80, 108,256,592.70 and 49,212,810.60 is: 73,819,215.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,171,061.80 : 108,256,592.70 = 49,212,810.60 : x
  2. Step 2: Convert to fraction form
    72,171,061.80/108,256,592.70 = 49,212,810.60/x
  3. Step 3: Cross multiply
    72,171,061.80x = 108,256,592.70 × 49,212,810.60
  4. Step 4: Simplify right side
    72,171,061.80x = 5,327,611,192,746,443
  5. Step 5: Solve for x
    x = 5,327,611,192,746,443/72,171,061.80
  6. Step 6: Final answer
    x = 73,819,215.90

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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.