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Finding the Fourth Proportional to 72,290,548.40, 108,519,803.40 and 43,569,114.80

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Solution

The fourth proportional to 72,290,548.40, 108,519,803.40 and 43,569,114.80 is: 65,404,286.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,290,548.40 : 108,519,803.40 = 43,569,114.80 : x
  2. Step 2: Convert to fraction form
    72,290,548.40/108,519,803.40 = 43,569,114.80/x
  3. Step 3: Cross multiply
    72,290,548.40x = 108,519,803.40 × 43,569,114.80
  4. Step 4: Simplify right side
    72,290,548.40x = 4,728,111,772,408,030
  5. Step 5: Solve for x
    x = 4,728,111,772,408,030/72,290,548.40
  6. Step 6: Final answer
    x = 65,404,286.96

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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.