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Finding the Fourth Proportional to 109,211.80, 163,817.70 and 39,065.80

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Solution

The fourth proportional to 109,211.80, 163,817.70 and 39,065.80 is: 58,598.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,211.80 : 163,817.70 = 39,065.80 : x
  2. Step 2: Convert to fraction form
    109,211.80/163,817.70 = 39,065.80/x
  3. Step 3: Cross multiply
    109,211.80x = 163,817.70 × 39,065.80
  4. Step 4: Simplify right side
    109,211.80x = 6,399,669,504.66
  5. Step 5: Solve for x
    x = 6,399,669,504.66/109,211.80
  6. Step 6: Final answer
    x = 58,598.70

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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.