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Finding the Fourth Proportional to 45,645.80, 68,468.70 and 38,428.70

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Solution

The fourth proportional to 45,645.80, 68,468.70 and 38,428.70 is: 57,643.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,645.80 : 68,468.70 = 38,428.70 : x
  2. Step 2: Convert to fraction form
    45,645.80/68,468.70 = 38,428.70/x
  3. Step 3: Cross multiply
    45,645.80x = 68,468.70 × 38,428.70
  4. Step 4: Simplify right side
    45,645.80x = 2,631,163,131.69
  5. Step 5: Solve for x
    x = 2,631,163,131.69/45,645.80
  6. Step 6: Final answer
    x = 57,643.05

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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.