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Finding the Fourth Proportional to 53,152.20, 79,728.30 and 21,562.20

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Solution

The fourth proportional to 53,152.20, 79,728.30 and 21,562.20 is: 32,343.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,152.20 : 79,728.30 = 21,562.20 : x
  2. Step 2: Convert to fraction form
    53,152.20/79,728.30 = 21,562.20/x
  3. Step 3: Cross multiply
    53,152.20x = 79,728.30 × 21,562.20
  4. Step 4: Simplify right side
    53,152.20x = 1,719,117,550.26
  5. Step 5: Solve for x
    x = 1,719,117,550.26/53,152.20
  6. Step 6: Final answer
    x = 32,343.30

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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.