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Finding the Fourth Proportional to 72,065.40, 107,903.70 and 52,236.60

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Solution

The fourth proportional to 72,065.40, 107,903.70 and 52,236.60 is: 78,213.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,065.40 : 107,903.70 = 52,236.60 : x
  2. Step 2: Convert to fraction form
    72,065.40/107,903.70 = 52,236.60/x
  3. Step 3: Cross multiply
    72,065.40x = 107,903.70 × 52,236.60
  4. Step 4: Simplify right side
    72,065.40x = 5,636,522,415.42
  5. Step 5: Solve for x
    x = 5,636,522,415.42/72,065.40
  6. Step 6: Final answer
    x = 78,213.99

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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.