Home / 72,400,905.10-108,601,357.65-21,288,090.70

Finding the Fourth Proportional to 72,400,905.10, 108,601,357.65 and 21,288,090.70

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Solution

The fourth proportional to 72,400,905.10, 108,601,357.65 and 21,288,090.70 is: 31,932,136.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,400,905.10 : 108,601,357.65 = 21,288,090.70 : x
  2. Step 2: Convert to fraction form
    72,400,905.10/108,601,357.65 = 21,288,090.70/x
  3. Step 3: Cross multiply
    72,400,905.10x = 108,601,357.65 × 21,288,090.70
  4. Step 4: Simplify right side
    72,400,905.10x = 2,311,915,551,796,339
  5. Step 5: Solve for x
    x = 2,311,915,551,796,339/72,400,905.10
  6. Step 6: Final answer
    x = 31,932,136.05

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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.