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Finding the Fourth Proportional to 53,614.40, 80,421.60 and 53,268.80

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Solution

The fourth proportional to 53,614.40, 80,421.60 and 53,268.80 is: 79,903.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,614.40 : 80,421.60 = 53,268.80 : x
  2. Step 2: Convert to fraction form
    53,614.40/80,421.60 = 53,268.80/x
  3. Step 3: Cross multiply
    53,614.40x = 80,421.60 × 53,268.80
  4. Step 4: Simplify right side
    53,614.40x = 4,283,962,126.08
  5. Step 5: Solve for x
    x = 4,283,962,126.08/53,614.40
  6. Step 6: Final answer
    x = 79,903.20

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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.