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Finding the Fourth Proportional to 45,812.80, 68,770.40 and 42,804.80

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Solution

The fourth proportional to 45,812.80, 68,770.40 and 42,804.80 is: 64,255.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,812.80 : 68,770.40 = 42,804.80 : x
  2. Step 2: Convert to fraction form
    45,812.80/68,770.40 = 42,804.80/x
  3. Step 3: Cross multiply
    45,812.80x = 68,770.40 × 42,804.80
  4. Step 4: Simplify right side
    45,812.80x = 2,943,703,217.92
  5. Step 5: Solve for x
    x = 2,943,703,217.92/45,812.80
  6. Step 6: Final answer
    x = 64,255.04

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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.