Home / 78,654.11-118,012.34-28,737.45

Finding the Fourth Proportional to 78,654.11, 118,012.34 and 28,737.45

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Solution

The fourth proportional to 78,654.11, 118,012.34 and 28,737.45 is: 43,117.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,654.11 : 118,012.34 = 28,737.45 : x
  2. Step 2: Convert to fraction form
    78,654.11/118,012.34 = 28,737.45/x
  3. Step 3: Cross multiply
    78,654.11x = 118,012.34 × 28,737.45
  4. Step 4: Simplify right side
    78,654.11x = 3,391,373,791.98
  5. Step 5: Solve for x
    x = 3,391,373,791.98/78,654.11
  6. Step 6: Final answer
    x = 43,117.57

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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.