Home / 99,660,766.80-149,512,145.40-42,123,421.20

Finding the Fourth Proportional to 99,660,766.80, 149,512,145.40 and 42,123,421.20

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Solution

The fourth proportional to 99,660,766.80, 149,512,145.40 and 42,123,421.20 is: 63,194,005.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,660,766.80 : 149,512,145.40 = 42,123,421.20 : x
  2. Step 2: Convert to fraction form
    99,660,766.80/149,512,145.40 = 42,123,421.20/x
  3. Step 3: Cross multiply
    99,660,766.80x = 149,512,145.40 × 42,123,421.20
  4. Step 4: Simplify right side
    99,660,766.80x = 6,297,963,075,199,843
  5. Step 5: Solve for x
    x = 6,297,963,075,199,843/99,660,766.80
  6. Step 6: Final answer
    x = 63,194,005.80

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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.