Home / 78,778.80-118,107.62-40,787.35

Finding the Fourth Proportional to 78,778.80, 118,107.62 and 40,787.35

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Solution

The fourth proportional to 78,778.80, 118,107.62 and 40,787.35 is: 61,149.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,778.80 : 118,107.62 = 40,787.35 : x
  2. Step 2: Convert to fraction form
    78,778.80/118,107.62 = 40,787.35/x
  3. Step 3: Cross multiply
    78,778.80x = 118,107.62 × 40,787.35
  4. Step 4: Simplify right side
    78,778.80x = 4,817,296,834.61
  5. Step 5: Solve for x
    x = 4,817,296,834.61/78,778.80
  6. Step 6: Final answer
    x = 61,149.66

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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.