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Finding the Fourth Proportional to 73,912.40, 102,001.48 and 40,378.40

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Solution

The fourth proportional to 73,912.40, 102,001.48 and 40,378.40 is: 55,723.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,912.40 : 102,001.48 = 40,378.40 : x
  2. Step 2: Convert to fraction form
    73,912.40/102,001.48 = 40,378.40/x
  3. Step 3: Cross multiply
    73,912.40x = 102,001.48 × 40,378.40
  4. Step 4: Simplify right side
    73,912.40x = 4,118,656,560.03
  5. Step 5: Solve for x
    x = 4,118,656,560.03/73,912.40
  6. Step 6: Final answer
    x = 55,723.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.