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Finding the Fourth Proportional to 76,436.70, 114,655.05 and 20,276.70

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Solution

The fourth proportional to 76,436.70, 114,655.05 and 20,276.70 is: 30,415.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,436.70 : 114,655.05 = 20,276.70 : x
  2. Step 2: Convert to fraction form
    76,436.70/114,655.05 = 20,276.70/x
  3. Step 3: Cross multiply
    76,436.70x = 114,655.05 × 20,276.70
  4. Step 4: Simplify right side
    76,436.70x = 2,324,826,052.34
  5. Step 5: Solve for x
    x = 2,324,826,052.34/76,436.70
  6. Step 6: Final answer
    x = 30,415.05

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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.