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Finding the Fourth Proportional to 66,687,980.64, 99,928,668.02 and 46,257,420.30

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Solution

The fourth proportional to 66,687,980.64, 99,928,668.02 and 46,257,420.30 is: 69,314,475.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,687,980.64 : 99,928,668.02 = 46,257,420.30 : x
  2. Step 2: Convert to fraction form
    66,687,980.64/99,928,668.02 = 46,257,420.30/x
  3. Step 3: Cross multiply
    66,687,980.64x = 99,928,668.02 × 46,257,420.30
  4. Step 4: Simplify right side
    66,687,980.64x = 4,622,442,396,389,021
  5. Step 5: Solve for x
    x = 4,622,442,396,389,021/66,687,980.64
  6. Step 6: Final answer
    x = 69,314,475.44

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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.