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Finding the Fourth Proportional to 67,840.56, 101,735.28 and 28,400.40

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Solution

The fourth proportional to 67,840.56, 101,735.28 and 28,400.40 is: 42,589.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,840.56 : 101,735.28 = 28,400.40 : x
  2. Step 2: Convert to fraction form
    67,840.56/101,735.28 = 28,400.40/x
  3. Step 3: Cross multiply
    67,840.56x = 101,735.28 × 28,400.40
  4. Step 4: Simplify right side
    67,840.56x = 2,889,322,646.11
  5. Step 5: Solve for x
    x = 2,889,322,646.11/67,840.56
  6. Step 6: Final answer
    x = 42,589.90

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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.