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Finding the Fourth Proportional to 91,871,999.80, 137,807,999.70 and 79,106,918.20

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Solution

The fourth proportional to 91,871,999.80, 137,807,999.70 and 79,106,918.20 is: 118,660,377.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,871,999.80 : 137,807,999.70 = 79,106,918.20 : x
  2. Step 2: Convert to fraction form
    91,871,999.80/137,807,999.70 = 79,106,918.20/x
  3. Step 3: Cross multiply
    91,871,999.80x = 137,807,999.70 × 79,106,918.20
  4. Step 4: Simplify right side
    91,871,999.80x = 10,901,566,159,573,524
  5. Step 5: Solve for x
    x = 10,901,566,159,573,524/91,871,999.80
  6. Step 6: Final answer
    x = 118,660,377.30

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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.