Home / 78,732,757.05-118,099,135.58-71,678,369.85

Finding the Fourth Proportional to 78,732,757.05, 118,099,135.58 and 71,678,369.85

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Solution

The fourth proportional to 78,732,757.05, 118,099,135.58 and 71,678,369.85 is: 107,517,554.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,732,757.05 : 118,099,135.58 = 71,678,369.85 : x
  2. Step 2: Convert to fraction form
    78,732,757.05/118,099,135.58 = 71,678,369.85/x
  3. Step 3: Cross multiply
    78,732,757.05x = 118,099,135.58 × 71,678,369.85
  4. Step 4: Simplify right side
    78,732,757.05x = 8,465,153,518,710,142
  5. Step 5: Solve for x
    x = 8,465,153,518,710,142/78,732,757.05
  6. Step 6: Final answer
    x = 107,517,554.78

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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.