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Finding the Fourth Proportional to 78,864, 118,237.68 and 47,692.32

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Solution

The fourth proportional to 78,864, 118,237.68 and 47,692.32 is: 71,503.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,864 : 118,237.68 = 47,692.32 : x
  2. Step 2: Convert to fraction form
    78,864/118,237.68 = 47,692.32/x
  3. Step 3: Cross multiply
    78,864x = 118,237.68 × 47,692.32
  4. Step 4: Simplify right side
    78,864x = 5,639,029,270.62
  5. Step 5: Solve for x
    x = 5,639,029,270.62/78,864
  6. Step 6: Final answer
    x = 71,503.21

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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.