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Finding the Fourth Proportional to 45,635.40, 68,496.30 and 28,139.40

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Solution

The fourth proportional to 45,635.40, 68,496.30 and 28,139.40 is: 42,235.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,635.40 : 68,496.30 = 28,139.40 : x
  2. Step 2: Convert to fraction form
    45,635.40/68,496.30 = 28,139.40/x
  3. Step 3: Cross multiply
    45,635.40x = 68,496.30 × 28,139.40
  4. Step 4: Simplify right side
    45,635.40x = 1,927,444,784.22
  5. Step 5: Solve for x
    x = 1,927,444,784.22/45,635.40
  6. Step 6: Final answer
    x = 42,235.74

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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.