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Finding the Fourth Proportional to 81,871,805.80, 122,807,708.70 and 43,608,053.80

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Solution

The fourth proportional to 81,871,805.80, 122,807,708.70 and 43,608,053.80 is: 65,412,080.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,871,805.80 : 122,807,708.70 = 43,608,053.80 : x
  2. Step 2: Convert to fraction form
    81,871,805.80/122,807,708.70 = 43,608,053.80/x
  3. Step 3: Cross multiply
    81,871,805.80x = 122,807,708.70 × 43,608,053.80
  4. Step 4: Simplify right side
    81,871,805.80x = 5,355,405,168,044,328
  5. Step 5: Solve for x
    x = 5,355,405,168,044,328/81,871,805.80
  6. Step 6: Final answer
    x = 65,412,080.70

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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.