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Finding the Fourth Proportional to 43,458.40, 65,206.80 and 20,072.80

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Solution

The fourth proportional to 43,458.40, 65,206.80 and 20,072.80 is: 30,118.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,458.40 : 65,206.80 = 20,072.80 : x
  2. Step 2: Convert to fraction form
    43,458.40/65,206.80 = 20,072.80/x
  3. Step 3: Cross multiply
    43,458.40x = 65,206.80 × 20,072.80
  4. Step 4: Simplify right side
    43,458.40x = 1,308,883,055.04
  5. Step 5: Solve for x
    x = 1,308,883,055.04/43,458.40
  6. Step 6: Final answer
    x = 30,118.07

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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.