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Finding the Fourth Proportional to 72,581,101.20, 108,871,651.80 and 65,190,790.80

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Solution

The fourth proportional to 72,581,101.20, 108,871,651.80 and 65,190,790.80 is: 97,786,186.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,581,101.20 : 108,871,651.80 = 65,190,790.80 : x
  2. Step 2: Convert to fraction form
    72,581,101.20/108,871,651.80 = 65,190,790.80/x
  3. Step 3: Cross multiply
    72,581,101.20x = 108,871,651.80 × 65,190,790.80
  4. Step 4: Simplify right side
    72,581,101.20x = 7,097,429,076,544,243
  5. Step 5: Solve for x
    x = 7,097,429,076,544,243/72,581,101.20
  6. Step 6: Final answer
    x = 97,786,186.20

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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.