Home / 66,428,137.90-99,642,206.85-40,786,000.30

Finding the Fourth Proportional to 66,428,137.90, 99,642,206.85 and 40,786,000.30

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Solution

The fourth proportional to 66,428,137.90, 99,642,206.85 and 40,786,000.30 is: 61,179,000.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,428,137.90 : 99,642,206.85 = 40,786,000.30 : x
  2. Step 2: Convert to fraction form
    66,428,137.90/99,642,206.85 = 40,786,000.30/x
  3. Step 3: Cross multiply
    66,428,137.90x = 99,642,206.85 × 40,786,000.30
  4. Step 4: Simplify right side
    66,428,137.90x = 4,064,007,078,476,761.50
  5. Step 5: Solve for x
    x = 4,064,007,078,476,761.50/66,428,137.90
  6. Step 6: Final answer
    x = 61,179,000.45

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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.