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Finding the Fourth Proportional to 72,086.40, 108,129.60 and 25,333.20

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Solution

The fourth proportional to 72,086.40, 108,129.60 and 25,333.20 is: 37,999.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,086.40 : 108,129.60 = 25,333.20 : x
  2. Step 2: Convert to fraction form
    72,086.40/108,129.60 = 25,333.20/x
  3. Step 3: Cross multiply
    72,086.40x = 108,129.60 × 25,333.20
  4. Step 4: Simplify right side
    72,086.40x = 2,739,268,782.72
  5. Step 5: Solve for x
    x = 2,739,268,782.72/72,086.40
  6. Step 6: Final answer
    x = 37,999.80

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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.