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Finding the Fourth Proportional to 78,698.50, 117,983.40 and 36,604.82

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Solution

The fourth proportional to 78,698.50, 117,983.40 and 36,604.82 is: 54,877.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,698.50 : 117,983.40 = 36,604.82 : x
  2. Step 2: Convert to fraction form
    78,698.50/117,983.40 = 36,604.82/x
  3. Step 3: Cross multiply
    78,698.50x = 117,983.40 × 36,604.82
  4. Step 4: Simplify right side
    78,698.50x = 4,318,761,119.99
  5. Step 5: Solve for x
    x = 4,318,761,119.99/78,698.50
  6. Step 6: Final answer
    x = 54,877.30

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1.5x scale

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.