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Finding the Fourth Proportional to 67,475.60, 101,215.80 and 20,728.40

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Solution

The fourth proportional to 67,475.60, 101,215.80 and 20,728.40 is: 31,093.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,475.60 : 101,215.80 = 20,728.40 : x
  2. Step 2: Convert to fraction form
    67,475.60/101,215.80 = 20,728.40/x
  3. Step 3: Cross multiply
    67,475.60x = 101,215.80 × 20,728.40
  4. Step 4: Simplify right side
    67,475.60x = 2,098,041,588.72
  5. Step 5: Solve for x
    x = 2,098,041,588.72/67,475.60
  6. Step 6: Final answer
    x = 31,093.34

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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.