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Finding the Fourth Proportional to 53,152.80, 79,729.20 and 30,991.20

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Solution

The fourth proportional to 53,152.80, 79,729.20 and 30,991.20 is: 46,486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,152.80 : 79,729.20 = 30,991.20 : x
  2. Step 2: Convert to fraction form
    53,152.80/79,729.20 = 30,991.20/x
  3. Step 3: Cross multiply
    53,152.80x = 79,729.20 × 30,991.20
  4. Step 4: Simplify right side
    53,152.80x = 2,470,903,583.04
  5. Step 5: Solve for x
    x = 2,470,903,583.04/53,152.80
  6. Step 6: Final answer
    x = 46,486.80

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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.