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Finding the Fourth Proportional to 72,682,672.60, 108,986,611.20 and 21,558,048.40

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Solution

The fourth proportional to 72,682,672.60, 108,986,611.20 and 21,558,048.40 is: 32,325,980.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,682,672.60 : 108,986,611.20 = 21,558,048.40 : x
  2. Step 2: Convert to fraction form
    72,682,672.60/108,986,611.20 = 21,558,048.40/x
  3. Step 3: Cross multiply
    72,682,672.60x = 108,986,611.20 × 21,558,048.40
  4. Step 4: Simplify right side
    72,682,672.60x = 2,349,538,639,201,582
  5. Step 5: Solve for x
    x = 2,349,538,639,201,582/72,682,672.60
  6. Step 6: Final answer
    x = 32,325,980.25

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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.