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Finding the Fourth Proportional to 108,406,969.60, 162,665,566.80 and 72,040,658.80

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Solution

The fourth proportional to 108,406,969.60, 162,665,566.80 and 72,040,658.80 is: 108,097,612.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,406,969.60 : 162,665,566.80 = 72,040,658.80 : x
  2. Step 2: Convert to fraction form
    108,406,969.60/162,665,566.80 = 72,040,658.80/x
  3. Step 3: Cross multiply
    108,406,969.60x = 162,665,566.80 × 72,040,658.80
  4. Step 4: Simplify right side
    108,406,969.60x = 11,718,534,596,347,408
  5. Step 5: Solve for x
    x = 11,718,534,596,347,408/108,406,969.60
  6. Step 6: Final answer
    x = 108,097,612.54

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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.