Home / 74,538.50-102,865-40,548.90

Finding the Fourth Proportional to 74,538.50, 102,865 and 40,548.90

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Solution

The fourth proportional to 74,538.50, 102,865 and 40,548.90 is: 55,958.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,538.50 : 102,865 = 40,548.90 : x
  2. Step 2: Convert to fraction form
    74,538.50/102,865 = 40,548.90/x
  3. Step 3: Cross multiply
    74,538.50x = 102,865 × 40,548.90
  4. Step 4: Simplify right side
    74,538.50x = 4,171,062,598.50
  5. Step 5: Solve for x
    x = 4,171,062,598.50/74,538.50
  6. Step 6: Final answer
    x = 55,958.50

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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.