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Finding the Fourth Proportional to 66,428,164.70, 99,642,247.05 and 40,786,027.10

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Solution

The fourth proportional to 66,428,164.70, 99,642,247.05 and 40,786,027.10 is: 61,179,040.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,428,164.70 : 99,642,247.05 = 40,786,027.10 : x
  2. Step 2: Convert to fraction form
    66,428,164.70/99,642,247.05 = 40,786,027.10/x
  3. Step 3: Cross multiply
    66,428,164.70x = 99,642,247.05 × 40,786,027.10
  4. Step 4: Simplify right side
    66,428,164.70x = 4,064,011,388,486,195
  5. Step 5: Solve for x
    x = 4,064,011,388,486,195/66,428,164.70
  6. Step 6: Final answer
    x = 61,179,040.65

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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.