Home / 72,400,939.60-108,601,409.40-21,288,125.20

Finding the Fourth Proportional to 72,400,939.60, 108,601,409.40 and 21,288,125.20

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Solution

The fourth proportional to 72,400,939.60, 108,601,409.40 and 21,288,125.20 is: 31,932,187.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,400,939.60 : 108,601,409.40 = 21,288,125.20 : x
  2. Step 2: Convert to fraction form
    72,400,939.60/108,601,409.40 = 21,288,125.20/x
  3. Step 3: Cross multiply
    72,400,939.60x = 108,601,409.40 × 21,288,125.20
  4. Step 4: Simplify right side
    72,400,939.60x = 2,311,920,400,203,657
  5. Step 5: Solve for x
    x = 2,311,920,400,203,657/72,400,939.60
  6. Step 6: Final answer
    x = 31,932,187.80

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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.