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Finding the Fourth Proportional to 79,957,071.20, 119,935,606.80 and 54,129,038.60

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Solution

The fourth proportional to 79,957,071.20, 119,935,606.80 and 54,129,038.60 is: 81,193,557.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,957,071.20 : 119,935,606.80 = 54,129,038.60 : x
  2. Step 2: Convert to fraction form
    79,957,071.20/119,935,606.80 = 54,129,038.60/x
  3. Step 3: Cross multiply
    79,957,071.20x = 119,935,606.80 × 54,129,038.60
  4. Step 4: Simplify right side
    79,957,071.20x = 6,491,999,089,991,622
  5. Step 5: Solve for x
    x = 6,491,999,089,991,622/79,957,071.20
  6. Step 6: Final answer
    x = 81,193,557.90

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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.