Home / 129,510,075.66-194,365,853.37-90,394,416.78

Finding the Fourth Proportional to 129,510,075.66, 194,365,853.37 and 90,394,416.78

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Solution

The fourth proportional to 129,510,075.66, 194,365,853.37 and 90,394,416.78 is: 135,661,938.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,510,075.66 : 194,365,853.37 = 90,394,416.78 : x
  2. Step 2: Convert to fraction form
    129,510,075.66/194,365,853.37 = 90,394,416.78/x
  3. Step 3: Cross multiply
    129,510,075.66x = 194,365,853.37 × 90,394,416.78
  4. Step 4: Simplify right side
    129,510,075.66x = 17,569,587,957,328,148
  5. Step 5: Solve for x
    x = 17,569,587,957,328,148/129,510,075.66
  6. Step 6: Final answer
    x = 135,661,938.79

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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.